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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/issues/issue-39367.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/issues/issue-39367.rs')
-rw-r--r-- | tests/ui/issues/issue-39367.rs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-39367.rs b/tests/ui/issues/issue-39367.rs new file mode 100644 index 000000000..e7beb8a03 --- /dev/null +++ b/tests/ui/issues/issue-39367.rs @@ -0,0 +1,42 @@ +// run-pass +// revisions: mir thir +// [thir]compile-flags: -Zthir-unsafeck + +use std::ops::Deref; + +struct ArenaSet<U: Deref, V=<U as Deref>::Target>(U, &'static V) + where V: 'static + ?Sized; + +static Z: [u8; 4] = [1,2,3,4]; + +fn arena() -> &'static ArenaSet<Vec<u8>> { + fn __static_ref_initialize() -> ArenaSet<Vec<u8>> { + ArenaSet(vec![], &Z) + } + unsafe { + use std::sync::Once; + fn require_sync<T: Sync>(_: &T) { } + unsafe fn __stability() -> &'static ArenaSet<Vec<u8>> { + use std::mem::transmute; + static mut DATA: *const ArenaSet<Vec<u8>> = std::ptr::null_mut(); + + static mut ONCE: Once = Once::new(); + ONCE.call_once(|| { + DATA = transmute + ::<Box<ArenaSet<Vec<u8>>>, *const ArenaSet<Vec<u8>>> + (Box::new(__static_ref_initialize())); + }); + + &*DATA + } + let static_ref = __stability(); + require_sync(static_ref); + static_ref + } +} + +fn main() { + let &ArenaSet(ref u, v) = arena(); + assert!(u.is_empty()); + assert_eq!(v, Z); +} |