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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/nll/relate_tys/universe-violation.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/nll/relate_tys/universe-violation.rs')
-rw-r--r-- | src/test/ui/nll/relate_tys/universe-violation.rs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/nll/relate_tys/universe-violation.rs b/src/test/ui/nll/relate_tys/universe-violation.rs new file mode 100644 index 000000000..c5f9d4406 --- /dev/null +++ b/src/test/ui/nll/relate_tys/universe-violation.rs @@ -0,0 +1,15 @@ +// Test that the NLL `relate_tys` code correctly deduces that a +// function returning either argument CANNOT be upcast to one +// that returns always its first argument. +// +// compile-flags:-Zno-leak-check + +fn make_it() -> fn(&'static u32) -> &'static u32 { + panic!() +} + +fn main() { + let a: fn(_) -> _ = make_it(); + let b: fn(&u32) -> &u32 = a; //~ ERROR mismatched types [E0308] + drop(a); +} |