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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/borrowck/borrowck-bad-nested-calls-free.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/borrowck/borrowck-bad-nested-calls-free.rs')
-rw-r--r-- | tests/ui/borrowck/borrowck-bad-nested-calls-free.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-bad-nested-calls-free.rs b/tests/ui/borrowck/borrowck-bad-nested-calls-free.rs new file mode 100644 index 000000000..b0bb9a035 --- /dev/null +++ b/tests/ui/borrowck/borrowck-bad-nested-calls-free.rs @@ -0,0 +1,35 @@ +// Test that we detect nested calls that could free pointers evaluated +// for earlier arguments. + + + +fn rewrite(v: &mut Box<usize>) -> usize { + *v = Box::new(22); + **v +} + +fn add(v: &usize, w: usize) -> usize { + *v + w +} + +fn implicit() { + let mut a: Box<_> = Box::new(1); + + // Note the danger here: + // + // the pointer for the first argument has already been + // evaluated, but it gets freed when evaluating the second + // argument! + add( + &*a, + rewrite(&mut a)); //~ ERROR cannot borrow +} + +fn explicit() { + let mut a: Box<_> = Box::new(1); + add( + &*a, + rewrite(&mut a)); //~ ERROR cannot borrow +} + +fn main() {} |