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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/borrowck/borrowck-loan-of-static-data-issue-27616.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/borrowck/borrowck-loan-of-static-data-issue-27616.rs')
-rw-r--r-- | src/test/ui/borrowck/borrowck-loan-of-static-data-issue-27616.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-loan-of-static-data-issue-27616.rs b/src/test/ui/borrowck/borrowck-loan-of-static-data-issue-27616.rs new file mode 100644 index 000000000..cb801ef1b --- /dev/null +++ b/src/test/ui/borrowck/borrowck-loan-of-static-data-issue-27616.rs @@ -0,0 +1,24 @@ +use std::mem; + +fn leak<T>(mut b: Box<T>) -> &'static mut T { + // isn't this supposed to be safe? + let inner = &mut *b as *mut _; + mem::forget(b); + unsafe { &mut *inner } +} + +fn evil(mut s: &'static mut String) +{ + // create alias + let alias: &'static mut String = s; + let inner: &str = &alias; + // free value + *s = String::new(); //~ ERROR cannot assign + let _spray = "0wned".to_owned(); + // ... and then use it + println!("{}", inner); +} + +fn main() { + evil(leak(Box::new("hello".to_owned()))); +} |