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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/try-block/try-block-bad-lifetime.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/try-block/try-block-bad-lifetime.rs')
-rw-r--r-- | src/test/ui/try-block/try-block-bad-lifetime.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/test/ui/try-block/try-block-bad-lifetime.rs b/src/test/ui/try-block/try-block-bad-lifetime.rs new file mode 100644 index 000000000..d9524e99f --- /dev/null +++ b/src/test/ui/try-block/try-block-bad-lifetime.rs @@ -0,0 +1,37 @@ +// compile-flags: --edition 2018 + +#![feature(try_blocks)] + +#[inline(never)] +fn do_something_with<T>(_x: T) {} + +// This test checks that borrows made and returned inside try blocks are properly constrained +pub fn main() { + { + // Test that borrows returned from a try block must be valid for the lifetime of the + // result variable + let result: Result<(), &str> = try { + let my_string = String::from(""); + let my_str: & str = & my_string; + //~^ ERROR `my_string` does not live long enough + Err(my_str) ?; + Err("") ?; + }; + do_something_with(result); + } + + { + // Test that borrows returned from try blocks freeze their referent + let mut i = 5; + let k = &mut i; + let mut j: Result<(), &mut i32> = try { + Err(k) ?; + i = 10; //~ ERROR cannot assign to `i` because it is borrowed + }; + ::std::mem::drop(k); //~ ERROR use of moved value: `k` + i = 40; //~ ERROR cannot assign to `i` because it is borrowed + + let i_ptr = if let Err(i_ptr) = j { i_ptr } else { panic ! ("") }; + *i_ptr = 50; + } +} |