From e055e1c449c0dbce541d83ac650ff1a99101c73d Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sat, 22 Jun 2024 15:25:46 +0200
Subject: [PATCH] add test for main thread thread-local destructors

---
 tests/ui/thread-local/main-thread-dtor.rs     | 31 +++++++++++++++++++
 .../thread-local/main-thread-dtor.run.stdout  |  2 ++
 2 files changed, 33 insertions(+)
 create mode 100644 tests/ui/thread-local/main-thread-dtor.rs
 create mode 100644 tests/ui/thread-local/main-thread-dtor.run.stdout

diff --git a/tests/ui/thread-local/main-thread-dtor.rs b/tests/ui/thread-local/main-thread-dtor.rs
new file mode 100644
index 0000000000000..5e6748c27bfe0
--- /dev/null
+++ b/tests/ui/thread-local/main-thread-dtor.rs
@@ -0,0 +1,31 @@
+//@ run-pass
+//@ check-run-results
+//@ needs-threads (really only needs TLS, not threads, but those seem to usually come together)
+//@ ignore-musl musl does not seem to run dtors on the main thread (issue #126858)
+//@ ignore-android android does not seem to run dtors on the main thread (issue #126858)
+//! Ensure that TLS destructors run on the main thread.
+
+struct Bar;
+
+impl Drop for Bar {
+    fn drop(&mut self) {
+        println!("Bar dtor");
+    }
+}
+
+struct Foo;
+
+impl Drop for Foo {
+    fn drop(&mut self) {
+        println!("Foo dtor");
+        // We initialize another thread-local inside the dtor, which is an interesting corner case.
+        thread_local!(static BAR: Bar = Bar);
+        BAR.with(|_| {});
+    }
+}
+
+thread_local!(static FOO: Foo = Foo);
+
+fn main() {
+    FOO.with(|_| {});
+}
diff --git a/tests/ui/thread-local/main-thread-dtor.run.stdout b/tests/ui/thread-local/main-thread-dtor.run.stdout
new file mode 100644
index 0000000000000..6160f2726492d
--- /dev/null
+++ b/tests/ui/thread-local/main-thread-dtor.run.stdout
@@ -0,0 +1,2 @@
+Foo dtor
+Bar dtor