[WIP] Move from rustc_serialize::json to serde_json.

[eddyb]

At this stage, this is more of a stubborn demo than anything else, because:

• this PR is based on both Start using serde_derive in a couple places in the compiler. #56447 and syntax: use MetaPath (a simpler version of Path) for Attribute and MetaItem. #56492, so it's waiting for at least those
• rustc_target::spec should use deriving instead of JSON manipulation
• rustdoc::html::render could probably be cleaner? (cc @dtolnay)
• rustc_save_analysis/RLS uses out-of-tree rustc_serialize (cc @nrc)
  • we might be able to switch it independently/first, but we'd still need Start using serde_derive in a couple places in the compiler. #56447
• the in-tree libserialize has things other than JSON that we could remove
  • out of scope for this PR?

r? @nikomatsakis cc @rust-lang/compiler

[rust-highfive]

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:0a288700:start=1543940861197950177,finish=1543940915006299051,duration=53808348874
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#Pull-Requests-and-Security-Restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
Setting environment variables from .travis.yml
$ export IMAGE=x86_64-gnu-llvm-5.0
---
travis_time:start:test_codegen
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---
travis_time:start:test_debuginfo
Check compiletest suite=debuginfo mode=debuginfo-both (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
[00:56:29] 
[00:56:29] running 118 tests
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---
travis_time:start:test_run-pass-fulldeps
Check compiletest suite=run-pass-fulldeps mode=run-pass (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
[00:56:59] 
[00:56:59] running 60 tests
[00:58:13] ..FFFFF...F.FF....F.....F.FF.F...FF.FF.......FF............test [run-pass] run-pass-fulldeps/myriad-closures.rs has been running for over 60 seconds
[01:00:10] failures:
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/custom-derive-partial-eq.rs stdout ----
[01:00:10] 
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_partial_eq.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_partial_eq.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/custom-derive-partial-eq/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/custom-derive-partial-eq/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"cannot find value `mitem` in this scope","code":{"code":"E0425","explanation":"\nAn unresolved name was used.\n\nErroneous code examples:\n\n```compile_fail,E0425\nsomething_that_doesnt_exist::foo;\n// error: unresolved name `something_that_doesnt_exist::foo`\n\n// or:\n\ntrait Foo {\n    fn bar() {\n        Self; // error: unresolved name `Self`\n    }\n}\n\n// or:\n\nlet x = unknown_variable;  // error: unresolved name `unknown_variable`\n```\n\nPlease verify that the name wasn't misspelled and ensure that the\nidentifier being referred to is valid for the given situation. Example:\n\n```\nenum something_that_does_exist {\n    Foo,\n}\n```\n\nOr:\n\n```\nmod something_that_does_exist {\n    pub static foo : i32 = 0i32;\n}\n\nsomething_that_does_exist::foo; // ok!\n```\n\nOr:\n\n```\nlet unknown_variable = 12u32;\nlet x = unknown_variable; // ok!\n```\n\nIf the item is not defined in the current module, it must be imported using a\n`use` statement, like so:\n\n```\n# mod foo { pub fn bar() {} }\n# fn main() {\nuse foo::bar;\nbar();\n# }\n```\n\nIf the item you are importing is not defined in some super-module of the\ncurrent module, then it must also be declared as public (e.g., `pub fn`).\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_partial_eq.rs","byte_start":2939,"byte_end":2944,"line_start":80,"line_end":80,"column_start":26,"column_end":31,"is_primary":true,"text":[{"text":"    trait_def.expand(cx, mitem, item, push)","highlight_start":26,"highlight_end":31}],"label":"did you mean `item`?","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0425]: cannot find value `mitem` in this scope\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_partial_eq.rs:80:26\n   |\nLL |     trait_def.expand(cx, mitem, item, push)\n   |                          ^^^^^ did you mean `item`?\n\n"}
[01:00:10] {"message":"function is expected to take 5 arguments, but it takes 4 arguments","code":{"code":"E0593","explanation":"\nYou tried to supply an `Fn`-base"highlight_end":22},{"text":"                |cx, span, subexpr, self_f, other_fs| {","highlight_start":1,"highlight_end":56},{"text":"                    let other_f = (other_fs.len(), other_fs.get(0)).1.unwrap();","highlight_start":1,"highlight_end":80},{"text":"                    let eq = cx.expr_binary(span, BinOpKind::Eq, self_f, other_f.clone());","highlight_start":1,"highlight_end":91},{"text":"                    cx.expr_binary(span, BinOpKind::And, subexpr, eq)","highlight_start":1,"highlight_end":70},{"text":"                },","highlight_start":1,"highlight_end":19},{"text":"                cx.expr_bool(span, true),","highlight_start":1,"highlight_end":42},{"text":"                Box::new(|cx, span, _, _| cx.expr_bool(span, false)),","highlight_start":1,"highlight_end":70},{"text":"                cx,","highlight_start":1,"highlight_end":20},{"text":"                span,","highlight_start":1,"highlight_end":22},{"text":"                substr)","highlight_start":1,"highlight_end":24},{"text":"    }","highlight_start":1,"highlight_end":6},{"text":"","highlight_start":1,"highlight_end":1},{"text":"    let inline = cx.meta_word(span, Symbol::intern(\"inline\"));","highlight_start":1,"highlight_end":63},{"text":"    let attrs = vec![cx.attribute(span, inline)];","highlight_start":1,"highlight_end":50},{"text":"    let methods = vec![MethodDef {","highlight_start":1,"highlight_end":35},{"text":"        name: \"eq\",","highlight_start":1,"highlight_end":20},{"text":"        generics: LifetimeBounds::empty(),","highlight_start":1,"highlight_end":43},{"text":"        explicit_self: borrowed_explicit_self(),","highlight_start":1,"highlight_end":49},{"text":"        args: vec![(borrowed_self(), \"other\")],","highlight_start":1,"highlight_end":48},{"text":"        ret_ty: Literal(deriving::generic::ty::Path::new_local(\"bool\")),","highlight_start":1,"highlight_end":73},{"text":"        attributes: attrs,","highlight_start":1,"highlight_end":27},{"text":"        is_unsafe: false,","highlight_start":1,"highlight_end":26},{"text":"        unify_fieldless_variants: true,","highlight_start":1,"highlight_end":40},{"text":"        combine_substructure: combine_substructure(Box::new(cs_eq)),","highlight_start":1,"highlight_end":69},{"text":"    }];","highlight_start":1,"highlight_end":8},{"text":"","highlight_start":1,"highlight_end":1},{"text":"    let trait_def = TraitDef {","highlight_start":1,"highlight_end":31},{"text":"        span: span,","highlight_start":1,"highlight_end":20},{"text":"        attributes: Vec::new(),","highlight_start":1,"highlight_end":32},{"text":"        path: deriving::generic::ty::Path::new(vec![\"cmp\", \"PartialEq\"]),","highlight_start":1,"highlight_end":74},{"text":"        additional_bounds: Vec::new(),","highlight_start":1,"highlight_end":39},{"text":"        generics: LifetimeBounds::empty(),","highlight_start":1,"highlight_end":43},{"text":"        is_unsafe: false,","highlight_start":1,"highlight_end":26},{"text":"        supports_unions: false,","highlight_start":1,"highlight_end":32},{"text":"        methods: methods,","highlight_start":1,"highlight_end":26},{"text":"        associated_types: Vec::new(),","highlight_start":1,"highlight_end":38},{"text":"    };","highlight_start":1,"highlight_end":7},{"text":"    trait_def.expand(cx, mitem, item, push)","highlight_start":1,"highlight_end":44},{"text":"}","highlight_start":1,"highlight_end":2}],"label":"takes 4 arguments","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"required because of the requirements on the impl of `syntax::ext::base::MultiItemDecorator` for `for<'r, 's, 't0, 't1> fn(&'r mut syntax::ext::base::ExtCtxt<'s>, syntax::source_map::Span, &'t0 syntax::ext::base::Annotatable, &'t1 mut (dyn std::ops::FnMut(syntax::ext::base::Annotatable) + 't1)) {expand_deriving_partial_eq}`","code":null,"level":"note","spans":[],"children":[],"rendered":null},{"message":"required for the cast to the object type `dyn syntax::ext::base::MultiItemDecorator + rustc_data_structures::sync::Sync + rustc_data_structures::sync::Send`","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0593]: function is expected to take 5 arguments, but it takes 4 arguments\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_partial_eq.rs:34:50\n   |\nLL |                                     MultiDecorator(Box::new(expand_deriving_partial_eq)));\n   |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected function that takes 5 arguments\n...\nLL | / fn expand_deriving_partial_eq(cx: &mut ExtCtxt, span: Span, item: &Annotatable,\nLL | |                               push: &mut FnMut(Annotatable)) {\nLL | |     // structures are equal if all fields are equal, and non equal, if\nLL | |     // any fields are not equal or if the enum variants are different\n...  |\d/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/derive-totalsum-attr/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/derive-totalsum-attr/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"this function takes 3 parameters but 4 parameters were supplied","code":{"code":"E0061","explanation":"\nThe number of arguments passed to a function must match the number of arguments\nspecified in the function signature.\n\nFor example, a function like:\n\n```\nfn f(a: u16, b: &str) {}\n```\n\nMust always be called with exactly two arguments, e.g. `f(2, \"test\")`.\n\nNote that Rust does not have a notion of optional function arguments or\nvariadic functions (except for its C-FFI).\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin_attr.rs","byte_start":2341,"byte_end":2347,"line_start":71,"line_end":71,"column_start":15,"column_end":21,"is_primary":true,"text":[{"text":"    trait_def.expand(cx, mitem, item, push)","highlight_start":15,"highlight_end":21}],"label":"expected 3 parameters","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0061]: this function takes 3 parameters but 4 parameters were supplied\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin_attr.rs:71:15\n   |\nLL |     trait_def.expand(cx, mitem, item, push)\n   |               ^^^^^^ expected 3 parameters\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0061`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0061`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/derive-totalsum-attr.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/derive-totalsum.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/derive-totalsum/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/derive-totalsum/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"this function takes 3 parameters but 4 parameters were supplied","code":{"code":"E0061","explanation":"\nThe number of arguments passed to a function must match the number of arguments\nspecified in the function signature.\n\nFor example, a function like:\n\n```\nfn f(a: u16, b: &str) {}\n```\n\nMust always be called with exactly two arguments, e.g. `f(2, \"test\")`.\n\nNote that Rust does not have a notion of optional function arguments or\nvariadic functions (except for its C-FFI).\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs","byte_start":3032,"byte_end":3038,"line_start":85,"line_end":85,"column_start":15,"column_end":21,"is_primary":true,"text":[{"text":"    trait_def.expand(cx, mitem, item, push)","highlight_start":15,"highlight_end":21}],"label":"expected 3 parameters","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0061]: this function takes 3 parameters but 4 parameters were supplied\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs:85:15\n   |\nLL |     trait_def.expand(cx, mitem, item, push)\n   |               ^^^^^^ expected 3 parameters\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0061`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0061`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/derive-totalsum.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/deriving-encodable-decodable-box.rs stdout ----
[01:00:10] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/deriving-encodable-decodable-box.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/deriving-encodable-decodable-box/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/deriving-encodable-decodable-box/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectively. Also verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/deriving-encodable-decodable-box.rs","byte_start":648,"byte_end":663,"line_start":20,"line_end":20,"column_start":5,"column_end":20,"is_primary":true,"text":[{"text":"use serialize::json;","highlight_start":5,"highlight_end":20}],"label":"no `json` in the root","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved import `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/deriving-encodable-decodable-box.rs:20:5\n   |\nLL | use serialize::json;\n   |     ^^^^^^^^^^^^^^^ no `json` in the root\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/deriving-encodable-decodable-box.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/deriving-encodable-decodable-cell-refcell.rs stdout ----
[01:00:10] 
[01:00:10] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:503:22
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/deriving-encodable-decodable-cell-refcell.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/deriving-encodable-decodable-cell-refcell/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/deriving-encodable-decodable-cell-refcell/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/deriving-encodable-decodable-cell-refcell.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/extern-mod-syntax.rs stdout ----
[01:00:10] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/extern-mod-syntax.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/extern-mod-syntax/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/extern-mod-syntax/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectively. Also verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/extern-mod-syntax.rs","byte_start":565,"byte_end":569,"line_start":15,"line_end":15,"column_start":16,"column_end":20,"is_primary":true,"text":[{"text":"use serialize::json::Object;","highlight_start":16,"highlight_end":20}],"label":"could not find `json` in `serialize`","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved import `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/extern-mod-syntax.rs:15:16\n   |\nLL | use serialize::json::Object;\n   |                ^^^^ could not find `json` in `serialize`\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/extern-mod-syntax.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/issue-11881.rs stdout ----
[01:00:10] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/issue-11881.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-11881/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-11881/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectively. Also verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/issue-11881.rs","byte_start":747,"byte_end":762,"line_start":26,"line_end":26,"column_start":5,"column_end":20,"is_primary":true,"text":[{"text":"use serialize::json;","highlight_start":5,"highlight_end":20}],"label":"no `json` in the root","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved import `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/issue-11881.rs:26:5\n   |\nLL | use serialize::json;\n   |     ^^^^^^^^^^^^^^^ no `json` in the root\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about  verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/issue-14021.rs","byte_start":654,"byte_end":669,"line_start":19,"line_end":19,"column_start":5,"column_end":20,"is_primary":true,"text":[{"text":"use serialize::json;","highlight_start":5,"highlight_end":20}],"label":"no `json` in the root","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved import `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/issue-14021.rs:19:5\n   |\nLL | use serialize::json;\n   |     ^^^^^^^^^^^^^^^ no `json` in the root\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/issue-14021.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/issue-15924.rs stdout ----
[01:00:10] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/issue-15924.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-15924/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-15924/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectively. Also verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\n] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/issue-2804.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-2804/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-2804/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved imports `serialize::json`, `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectively. Also verify that you didn't misspell the import\nname and that the import exists in the module from where you tried to\nimport it. Example:\n\n```\nuse self::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/issue-2804.rs","byte_start":631,"byte_end":635,"line_start":18,"line_end":18,"column_start":23,"column_end":27,"is_primary":true,"text":[{"text":"use serialize::json::{self, Json};","highlight_start":23,"highlight_end":27}],"label":"no `json` in the root","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/run-pass-fulldeps/issue-2804.rs","byte_start":624,"byte_end":628,"line_start":18,"line_end":18,"column_start":16,"column_end":20,"is_primary":true,"text":[{"text":"use serialize::json::{self, Json};","highlight_start":16,"highlight_end":20}],"label":"could not find `json` in `serialize`","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved imports `serialize::json`, `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/issue-2804.rs:18:23\n   |\nLL | use serialize::json::{self, Json};\n   |                ^^^^   ^^^^ no `json` in the root\n   |                |\n   |                could not find `json` in `serialize`\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/issue-2804.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/issue-4016.rs stdout ----
[01:00:10] 
[01:00:10] error: test compilation failed although it shouldn't!
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/issue-4016.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-4016/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-4016/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unresolved import `serialize::json`","code":{"code":"E0432","explanation":"\nAn import was unresolved.\n\nErroneous code example:\n\n```compile_fail,E0432\nuse something::Foo; // error: unresolved import `something::Foo`.\n```\n\nPaths in `use` statements are relative to the crate root. To import items\nrelative to the current and parent modules, use the `self::` and `super::`\nprefixes, respectivself::something::Foo; // ok!\n\nmod something {\n    pub struct Foo;\n}\n# fn main() {}\n```\n\nOr, if you tried to use a module from an external crate, you may have missed\nthe `extern crate` declaration (which is usually placed in the crate root):\n\n```\nextern crate core; // Required to use the `core` crate\n\nuse core::any;\n# fn main() {}\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/issue-4036.rs","byte_start":686,"byte_end":690,"line_start":21,"line_end":21,"column_start":17,"column_end":21,"is_primary":true,"text":[{"text":"use serialize::{json, Decodable};","highlight_start":17,"highlight_end":21}],"label":"no `json` in the root","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0432]: unresolved import `serialize::json`\n  --> /checkout/src/test/run-pass-fulldeps/issue-4036.rs:21:17\n   |\nLL | use serialize::{json, Decodable};\n   |                 ^^^^ no `json` in the root\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0432`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0432`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/issue-4036.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/issue-40663.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-40663/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/issue-40663/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"this function takes 3 parameters but 4 parameters were supplied","code":{"code":"E0061","explanation":"\nThe number of arguments passed to a function must match the number of arguments\nspecified in the function signature.\n\nFor example, a function like:\n\n```\nfn f(a: u16, b: &str) {}\n```\n\nMust always be called with exactly two arguments, e.g. `f(2, \"test\")`.\n\nNote that Rust does not have a notion of optional function arguments or\nvariadic functions (except for its C-FFI).\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs","byte_start":3032,"byte_end":3038,"line_start":85,"line_end":85,"column_start":15,"column_end":21,"is_primary":true,"text":[{"text":"    trait_def.expand(cx, mitem, item, push)","highlight_start":15,"highlight_end":21}],"label":"expected 3 parameters","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0061]: this function takes 3 parameters but 4 parameters were supplied\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin.rs:85:15\n   |\nLL |     trait_def.expand(cx, mitem, item, push)\n   |               ^^^^^^ expected 3 parameters\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0061`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0061`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/issue-40663.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/macro-crate-does-hygiene-work.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-does-hygiene-work/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-does-hygiene-work/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unused macro definition","code":{"code":"unused_macros","explanation":null},"level":"warning","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":1010,"byte_end":1053,"line_start":33,"line_end":33,"column_start":1,"column_end":44,"is_primary":true,"text":[{"text":"macro_rules! unexported_macro { () => (3) }","highlight_start":1,"highlight_end":44}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_macros)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: unused macro definition\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:33:1\n   |\nLL | macro_rules! unexported_macro { () => (3) }\n   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n   |\n   = note: #[warn(unused_macros)] on "children":[],"rendered":"For more information about this error, try `rustc --explain E0609`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/macro-crate-does-hygiene-work.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/macro-crate-multi-decorator-literals.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-multi-decorator-literals/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-multi-decorator-literals/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unused macro definition","code":{"code":"unused_macros","explanation":null},"level":"warning","spans":[{"file_name":"/checkout/src/test/run-pass-full   word.ident.segments.last().unwrap().ident","highlight_start":22,"highlight_end":27}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0609]: no field `ident` on type `&syntax::ast::MetaItem`\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:115:22\n   |\nLL |                 word.ident.segments.last().unwrap().ident\n   |                      ^^^^^\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0609`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0609`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/macro-crate-multi-decorator-literals.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/macro-crate-multi-decorator.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-multi-decorator/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate-multi-decorator/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unused macro definition","code":{"code":"unused_macros","explanation":null},"level":"warning","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":1010,"byte_end":1053,"line_start":33,"line_end":33,"column_start":1,"column_end":44,"is_primary":true,"text":[{"text":"macro_rules! unexported_macro { () => (3) }","highlight_start":1,"highlight_end":44}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_macros)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: unused macro definition\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:33:1\n   |\nLL | macro_rules! unexported_macro { () => (3) }\n   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n   |\n   = note: #[warn(unused_macros)] on by default\n\n"}
[01:00:10] {"message":"no field `ident` on type `&syntax::ast::MetaItem`","code":{"code":"E0609","explanation":"\nAttempted to access a non-existent [01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/macro-crate.rs stdout ----
[01:00:10] 
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/macro-crate/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unused macro definition","code":{"code":"unused_macros","explanation":null},"level":"warning","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":1010,"byte_end":1053,"line_start":33,"line_end":33,"column_start":1,"column_end":44,"is_primary":true,"text":[{"text":"macro_rules! unexported_macro { () => (3) }","highlight_start":1,"highlight_end":44}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_macros)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: unused macro definition\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:33:1\n   |\nLL | macro_rules! unexported_macro { () => (3) }\n   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n   |\n   = note: #[warn(unused_macros)] on by default\n\n"}
[01:00:10] {"message":"no field `ident` on type `&syntax::ast::MetaItem`","code":{"code":"E0609","explanation":"\nAttempted to access a non-existent field in a struct.\n\nErroneous code example:\n\n```compile_fail,E0609\nstruct StructWithFields {\n    x: u32,\n}\n\nlet s = StructWithFields { x: 0 };\nprintln!(\"{}\", s.foo); // error: no field `foo` on type `StructWithFields`\n```\n\nTo fix this error, check that you didn't misspell the field's name or that the\nfield actually exists. Example:\n\n```\nstruct StructWithFields {\n    x: u32,\n}\n\nlet s = StructWithFields { x: 0 };\nprintln!(\"{}\", s.x); // ok!\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":4406,"byte_end":4411,"line_start":115,"line_end":115,"column_start":22,"column_end":27,"is_primary":true,"text":[{"text":"                word.ident.segments.last().unwrap().ident","highlight_start":22,"highlight_end":27}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0609]: no field `ident` on type `&syntax::ast::MetaItem`\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:115:22\n   |\nLL |                 word.ident.segments.last().unwrap().ident\n   |                      ^^^^^\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0609`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0609`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/macro-crate.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
[01:00:10] 
[01:00:10] ---- [run-pass] run-pass-fulldeps/plugin-lib-ok-in-plugin.rs stdout ----
[01:00:10] 
[01:00:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/plugin-lib-ok-in-plugin/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-g0:10] error: auxiliary build of "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" failed to compile: 
[01:00:10] status: exit code: 1
[01:00:10] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/plugin-plus-extern-crate/auxiliary" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps/plugin-plus-extern-crate/auxiliary"
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] ------------------------------------------
[01:00:10] stderr:
[01:00:10] stderr:
[01:00:10] ------------------------------------------
[01:00:10] {"message":"unused macro definition","code":{"code":"unused_macros","explanation":null},"level":"warning","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":1010,"byte_end":1053,"line_start":33,"line_end":33,"column_start":1,"column_end":44,"is_primary":true,"text":[{"text":"macro_rules! unexported_macro { () => (3) }","highlight_start":1,"highlight_end":44}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_macros)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: unused macro definition\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:33:1\n   |\nLL | macro_rules! unexported_macro { () => (3) }\n   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n   |\n   = note: #[warn(unused_macros)] on by default\n\n"}
[01:00:10] {"message":"no field `ident` on type `&syntax::ast::MetaItem`","code":{"code":"E0609","explanation":"\nAttempted to access a non-existent field in a struct.\n\nErroneous code example:\n\n```compile_fail,E0609\nstruct StructWithFields {\n    x: u32,\n}\n\nlet s = StructWithFields { x: 0 };\nprintln!(\"{}\", s.foo); // error: no field `foo` on type `StructWithFields`\n```\n\nTo fix this error, check that you didn't misspell the field's name or that the\nfield actually exists. Example:\n\n```\nstruct StructWithFields {\n    x: u32,\n}\n\nlet s = StructWithFields { x: 0 };\nprintln!(\"{}\", s.x); // ok!\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs","byte_start":4406,"byte_end":4411,"line_start":115,"line_end":115,"column_start":22,"column_end":27,"is_primary":true,"text":[{"text":"                word.ident.segments.last().unwrap().ident","highlight_start":22,"highlight_end":27}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0609]: no field `ident` on type `&syntax::ast::MetaItem`\n  --> /checkout/src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs:115:22\n   |\nLL |                 word.ident.segments.last().unwrap().ident\n   |                      ^^^^^\n\n"}
[01:00:10] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[01:00:10] {"message":"For more information about this error, try `rustc --explain E0609`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0609`.\n"}
[01:00:10] ------------------------------------------
[01:00:10] 
[01:00:10] thread '[run-pass] run-pass-fulldeps/plugin-plus-extern-crate.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
[01:00:10] 
---
[01:00:10] test result: FAILED. 41 passed; 19 failed; 0 ignored; 0 measured; 0 filtered out
[01:00:10] 
[01:00:10] 
[01:00:10] 
[01:00:10] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/run-pass-fulldeps" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass-fulldeps" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "run-pass" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-5.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "5.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
[01:00:10] 
[01:00:10] 
[01:00:10] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[01:00:10] Build completed unsuccessfully in 0:14:37
[01:00:10] Build completed unsuccessfully in 0:14:37
[01:00:11] Makefile:58: recipe for target 'check' failed
[01:00:11] make: *** [check] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:01392400
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue Dec  4 17:28:54 UTC 2018
---
travis_time:end:15c336e0:start=1543944536202149160,finish=1543944536208924082,duration=6774922
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:01b671a3
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[Xanewok]

@eddyb if that helps rls-data (key crate that rustc_save_analysis dumps all the info into) already is capable of serializing with serde exclusively https://github.com/rust-dev-tools/rls-data/blob/9edbe8b4947c10ef670c4723be375c6944cab640/src/lib.rs#L13-L21 (still needs #56447 as you said)

[bors]

☔ The latest upstream changes (presumably #54517) made this pull request unmergeable. Please resolve the merge conflicts.

[alexcrichton]

Closing in favor of #56795