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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-swap-mut-base-ptr.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-swap-mut-base-ptr.rs')
-rw-r--r-- | src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs b/src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs new file mode 100644 index 000000000..8170323ef --- /dev/null +++ b/src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs @@ -0,0 +1,22 @@ +// Test that attempt to swap `&mut` pointer while pointee is borrowed +// yields an error. +// +// Example from compiler/rustc_borrowck/borrowck/README.md + +use std::mem::swap; + + + +fn foo<'a>(mut t0: &'a mut isize, + mut t1: &'a mut isize) { + let p: &isize = &*t0; // Freezes `*t0` + swap(&mut t0, &mut t1); //~ ERROR cannot borrow `t0` + *t1 = 22; + p.use_ref(); +} + +fn main() { +} + +trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } } +impl<T> Fake for T { } |