Add test for issue #37508

Author: marmeladema

src/test/ui/thread-local-issue-37508.rs

@@ -0,0 +1,22 @@
+// compile-flags: --crate-type rlib -C opt-level=3 -C code-model=large
+// build-pass
+
+#![no_std]
+#![feature(thread_local)]
+
+pub struct BB;
+
+#[thread_local]
+static mut KEY: Key = Key { inner: BB, dtor_running: false };
+
+pub unsafe fn set() -> Option<&'static BB> {
+    if KEY.dtor_running {
+        return None;
+    }
+    Some(&KEY.inner)
+}
+
+pub struct Key {
+    inner: BB,
+    dtor_running: bool,
+}