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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/never_type/never_transmute_never.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/never_type/never_transmute_never.rs')
-rw-r--r-- | src/test/ui/never_type/never_transmute_never.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/never_type/never_transmute_never.rs b/src/test/ui/never_type/never_transmute_never.rs new file mode 100644 index 000000000..fce3ced9a --- /dev/null +++ b/src/test/ui/never_type/never_transmute_never.rs @@ -0,0 +1,23 @@ +// check-pass + +#![crate_type="lib"] + +#![feature(never_type)] +#![allow(dead_code)] +#![allow(unreachable_code)] +#![allow(unused_variables)] + +struct Foo; + +pub fn f(x: !) -> ! { + x +} + +pub fn ub() { + // This is completely undefined behaviour, + // but we still want to make sure it compiles. + let x: ! = unsafe { + std::mem::transmute::<Foo, !>(Foo) + }; + f(x) +} |