From 8d06e911eff887e286f14279418e0a1cd9b80ea1 Mon Sep 17 00:00:00 2001
From: saberoueslati <saberoueslati12@gmail.com>
Date: Sun, 6 Sep 2026 00:30:48 +0100
Subject: [PATCH] Fix non-idempotent indentation of consecutive block comments

---
 src/missed_spans.rs        |  4 +++-
 tests/source/issue-7019.rs | 36 ++++++++++++++++++++++++++++++++
 tests/target/issue-7019.rs | 42 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 tests/source/issue-7019.rs
 create mode 100644 tests/target/issue-7019.rs

diff --git a/src/missed_spans.rs b/src/missed_spans.rs
index 0242094a752..f45a1242c97 100644
--- a/src/missed_spans.rs
+++ b/src/missed_spans.rs
@@ -245,7 +245,9 @@ impl<'a> FmtVisitor<'a> {
             .rev()
             .find(|rev_c| ![' ', '\t'].contains(rev_c));
 
-        let fix_indent = last_char.map_or(true, |rev_c| ['{', '\n'].contains(&rev_c));
+        let starts_output_line = !self.buffer.is_empty() && self.buffer.ends_with('\n');
+        let fix_indent =
+            starts_output_line || last_char.map_or(true, |rev_c| ['{', '\n'].contains(&rev_c));
         let mut on_same_line = false;
 
         let comment_indent = if fix_indent {
diff --git a/tests/source/issue-7019.rs b/tests/source/issue-7019.rs
new file mode 100644
index 00000000000..ebb7557fa4e
--- /dev/null
+++ b/tests/source/issue-7019.rs
@@ -0,0 +1,36 @@
+fn two() -> usize {
+    /*A*/ /*B*/
+    1 + 2
+}
+
+fn three() -> usize {
+    /*A*/ /*B*/ /*C*/
+    1 + 2
+}
+
+fn nested() -> usize {
+    {
+        {
+            /*A*/ /*B*/ /*C*/
+            1 + 2
+        }
+    }
+}
+
+fn between_statements() -> usize {
+    let a = 1;
+    /*A*/ /*B*/
+    let b = 2;
+    a + b
+}
+
+fn trailing_inline() -> usize {
+    let a = 1; /*trailing*/
+    a
+}
+
+fn already_canonical() -> usize {
+    /*A*/
+    /*B*/
+    1 + 2
+}
diff --git a/tests/target/issue-7019.rs b/tests/target/issue-7019.rs
new file mode 100644
index 00000000000..62f4383aac5
--- /dev/null
+++ b/tests/target/issue-7019.rs
@@ -0,0 +1,42 @@
+fn two() -> usize {
+    /*A*/
+    /*B*/
+    1 + 2
+}
+
+fn three() -> usize {
+    /*A*/
+    /*B*/
+    /*C*/
+    1 + 2
+}
+
+fn nested() -> usize {
+    {
+        {
+            /*A*/
+            /*B*/
+            /*C*/
+            1 + 2
+        }
+    }
+}
+
+fn between_statements() -> usize {
+    let a = 1;
+    /*A*/
+    /*B*/
+    let b = 2;
+    a + b
+}
+
+fn trailing_inline() -> usize {
+    let a = 1; /*trailing*/
+    a
+}
+
+fn already_canonical() -> usize {
+    /*A*/
+    /*B*/
+    1 + 2
+}