From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs (limited to 'src/test/ui/borrowck/borrowck-swap-mut-base-ptr.rs') 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 Fake for T { } -- cgit v1.2.3