From d6e70df1a2b1b335a52d509287534e6e94ceb9e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= <matthias.krueger@famsik.de>
Date: Sun, 24 Mar 2024 13:07:30 +0100
Subject: [PATCH] crashes: add another test showing that everything works fine
 when we need compile-flags to repro an ice and add README

---
 src/tools/opt-dist/src/tests.rs |  2 +-
 tests/crashes/122909.rs         | 15 +++++++++++++++
 tests/crashes/README.md         | 13 +++++++++++++
 tests/crashes/no-ice.rs         |  1 -
 4 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 tests/crashes/122909.rs
 create mode 100644 tests/crashes/README.md
 delete mode 100644 tests/crashes/no-ice.rs

diff --git a/src/tools/opt-dist/src/tests.rs b/src/tools/opt-dist/src/tests.rs
index b5dfd2fc5af..46b0a543802 100644
--- a/src/tools/opt-dist/src/tests.rs
+++ b/src/tools/opt-dist/src/tests.rs
@@ -96,7 +96,7 @@ pub fn run_tests(env: &Environment) -> anyhow::Result<()> {
         "tests/pretty",
         "tests/run-pass-valgrind",
         "tests/ui",
-        "tests/crases",
+        "tests/crashes",
     ];
     for test_path in env.skipped_tests() {
         args.extend(["--skip", test_path]);
diff --git a/tests/crashes/122909.rs b/tests/crashes/122909.rs
new file mode 100644
index 00000000000..344fcd88010
--- /dev/null
+++ b/tests/crashes/122909.rs
@@ -0,0 +1,15 @@
+//@ compile-flags: -Zpolymorphize=on -Zinline-mir=yes
+//@ known-bug: #12345
+
+
+use std::sync::{Arc, Context, Weak};
+
+pub struct WeakOnce<T>();
+impl<T> WeakOnce<T> {
+    extern "rust-call" fn try_get(&self) -> Option<Arc<T>> {}
+
+    pub fn get(&self) -> Arc<T> {
+        self.try_get()
+            .unwrap_or_else(|| panic!("Singleton {} not available", std::any::type_name::<T>()))
+    }
+}
diff --git a/tests/crashes/README.md b/tests/crashes/README.md
new file mode 100644
index 00000000000..28346b26e37
--- /dev/null
+++ b/tests/crashes/README.md
@@ -0,0 +1,13 @@
+This is serves as a collection of crashes so that accidental ICE fixes are tracked.
+This was formally done at https://github.com/rust-lang/glacier but doing it inside
+the rustc testsuite is more convenient.
+
+It is imperative that a test in the suite causes an internal compiler error/panic
+or makes rustc crash in some other way.
+Accepted exit codes are: 101 (may be expanded later)
+
+When adding crashes from https://github.com/rust-lang/rust/issues, the
+issue number should be noted in the file name (12345.rs should suffice)
+and perhaps also inside the file via `//@ known-bug #4321`
+
+If you happen to fix one of the crashes, please move it to `tests/ui`! :)
diff --git a/tests/crashes/no-ice.rs b/tests/crashes/no-ice.rs
deleted file mode 100644
index da0f5d925d1..00000000000
--- a/tests/crashes/no-ice.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub fn main() {}