Bump Jint from 4.16.0 to 4.16.1 - #353

Sourced from Jint's releases.

4.16.1

Jint 4.16.1 is the first release from the new 4.x maintenance branch, and it marks the point where the two lines separate: main is now 5.0.0 development, and 4.x is where the 4.16.x line continues.

What that means for you. If you are on 4.16.0, this is a drop-in update — it is correctness and conformance work only, no API change and no changed default. Every public signature is the same one 4.16.0 shipped, on all five target frameworks. If you want the 4.x line, take it from 4.x and expect fixes rather than features. If you want to follow where the engine is going, watch main — v5 brings breaking API changes, an opt-in WHATWG web API surface, Web Workers, Node compatibility and a raised .NET Framework floor, and every one of them is recorded as it lands in docs/v5-migration.md.

From this release onward the 4.x public surface is snapshotted per target framework in Jint.Tests.PublicInterface/Verify/, so "did the API move?" is a diff rather than a judgement call — on this branch a diff there is a bug, and comparing those files against main's is the v4→v5 delta.

Highlights

Conformance, from a suite that now runs more of test262. The staging/ directory is generated and executed for the first time (#​3016), which is roughly 2,800 additional cases — largely SpiderMonkey's own suite contributed upstream, covering behaviour the stable directories never reach. Much of the work below is what it found.

Built-ins do what the spec says, step by step. The array built-ins perform the internal methods they name rather than equivalents (#​3066); Array.from honours IsConstructor and a typed array's length write throws (#​3043); an array truncation walks downwards and the generics report the writes they fail (#​3072); argument validation and evaluation order are corrected in five built-ins (#​3069); Map and Set get the [[SetData]] tombstone their traversals are specified over (#​3073); Date.prototype.setTime stores the clipped time value (#​3042); and Array.prototype.values/keys/entries no longer gate on an array-like receiver (#​3236).

Iterators and control flow. A throw from the iterator step no longer closes the iterator (#​3047); the done flag is consulted before stepping again (#​3048); a rejected return() propagates out of an abandoned for await loop (#​3113); an optional-chain short circuit is distinguished from a genuine undefined (#​3040); a computed property key is evaluated even when spelled as a literal (#​3039) and survives an await or yield intact (#​3144, #​3150); and destructuring the rest of an exhausted array yields an empty array rather than 2³² elements (#​3263).

Numeric and string accuracy. Math.acosh, asinh, atanh, cbrt, expm1 and log1p are ported from fdlibm for correctly-rounded results across every target framework (#​3050); toFixed formats from the double's exact value and reads this from [[NumberData]] (#​3071); String.prototype case conversion derives from Jint's own Unicode tables rather than the host's culture data (#​3068); and the regex engine is chosen per subject, with RegExp.prototype.replace no longer rewriting lastIndex (#​3070).

Bounds that hold. JavaScript strings have a maximum length instead of a wrapped array rent (#​3015); a JSON document too long to become a string is refused while it is being built (#​3028); a frame displaced by a proper tail call keeps counting while its trampoline runs, so MaxRecursionDepth cannot be evaded by leaving and re-entering the trampoline (#​3022); and an Atomics waiter is released when nothing can ever notify it again (#​3029).

Error messages no longer run user JavaScript (#​3041) — rendering a message for a value with a script-supplied toString used to invoke it, from inside the failure path.

Internationalization. The five Temporal members the proposal removed are dropped (#​3014), and u-extension options are canonicalized with every date format the spec allows (#​3018).

Two fixes in this release come from @​svenrog — a sloppy function answering its own arguments (#​3061) and the outer link on a parked Function-constructor environment (#​3063).

What's Changed

• Drop the five Temporal members the proposal removed by @​lahma in Drop the five Temporal members the proposal removed sebastienros/jint#3014
• Canonicalize u-extension options and format every date the spec allows by @​lahma in Canonicalize u-extension options and format every date the spec allows sebastienros/jint#3018
• Mark a global created by an unresolvable assignment, and stop a waitAsync timeout outliving its engine by @​lahma in Mark a global created by an unresolvable assignment, and stop a waitAsync timeout outliving its engine sebastienros/jint#3019
• Run test262's staging/ directory too by @​lahma in Run test262's staging/ directory too sebastienros/jint#3016
• Give JavaScript strings a maximum length instead of a wrapped array rent by @​lahma in Give JavaScript strings a maximum length instead of a wrapped array rent sebastienros/jint#3015
• Let a for-of frame decline the unwind it can only rethrow by @​lahma in Let a for-of frame decline the unwind it can only rethrow sebastienros/jint#3017
• Keep counting a frame a tail call replaced while its trampoline runs by @​lahma in Keep counting a frame a tail call replaced while its trampoline runs sebastienros/jint#3022
• Unpark staging/Temporal/removed-methods.js, which #​3014 already fixed by @​lahma in Unpark staging/Temporal/removed-methods.js, which #3014 already fixed sebastienros/jint#3023
• Drop the Islamic date conversions no calendar path reaches by @​lahma in Drop the Islamic date conversions no calendar path reaches sebastienros/jint#3027
• Let an Atomics waiter go when nothing can ever notify it again by @​lahma in Let an Atomics waiter go when nothing can ever notify it again sebastienros/jint#3029
• Refuse a JSON document too long to be a string while it is being built by @​lahma in Refuse a JSON document too long to be a string while it is being built sebastienros/jint#3028
• Bump the microsoft group with 3 updates by @​dependabot[bot] in Bump the microsoft group with 3 updates sebastienros/jint#3033
• Bump the analyzers group with 1 update by @​dependabot[bot] in Bump the analyzers group with 1 update sebastienros/jint#3031
• Add initial threat model for untrusted scripts by @​sebastienros in Add initial threat model for untrusted scripts sebastienros/jint#3030
• Stop ClassBenchmark rebuilding its engine per iteration by @​lahma in Stop ClassBenchmark rebuilding its engine per iteration sebastienros/jint#3053
• createRealm installs a full $262 on the new realm and returns it by @​lahma in createRealm installs a full $262 on the new realm and returns it sebastienros/jint#3044
• Give the benchmark suite a measurement environment by @​lahma in Give the benchmark suite a measurement environment sebastienros/jint#3055
• Evaluate a computed property key even when it is spelled as a literal by @​lahma in Evaluate a computed property key even when it is spelled as a literal sebastienros/jint#3039
• Stop error messages from running user JavaScript by @​lahma in Stop error messages from running user JavaScript sebastienros/jint#3041
• Array.from honours IsConstructor, and a typed array's length write throws by @​lahma in Array.from honours IsConstructor, and a typed array's length write throws sebastienros/jint#3043
• Consult the iterator's done flag before stepping it again by @​lahma in Consult the iterator's done flag before stepping it again sebastienros/jint#3048
• Date.prototype.setTime must store the clipped time value by @​lahma in Date.prototype.setTime must store the clipped time value sebastienros/jint#3042
• Answer a sloppy function's own arguments instead of throwing by @​svenrog in Answer a sloppy function's own arguments instead of throwing sebastienros/jint#3061
• Keep the outer link on a parked Function-constructor environment by @​svenrog in Keep the outer link on a parked Function-constructor environment sebastienros/jint#3063
• A throw from the iterator step must not close the iterator by @​lahma in A throw from the iterator step must not close the iterator sebastienros/jint#3047
  ... (truncated)

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