Reproduce issue 153

.github/workflows/repro.yml

@@ -0,0 +1,18 @@
+name: Repro
+
+on:
+  push:
+    branches: [repro]
+
+permissions:
+  contents: read
+
+jobs:
+  repro:
+    name: Repro
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    steps:
+      - run: echo 1.85.0 > rust-toolchain
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo fmt --check

.gitignore

@@ -0,0 +1,2 @@
+/target/
+/Cargo.lock

Cargo.toml

@@ -0,0 +1,5 @@
+[package]
+name = "repro"
+version = "0.0.0"
+edition = "2024"
+publish = false

src/main.rs

@@ -0,0 +1 @@
+fn main() {}