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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/borrowck/borrowck-closures-use-after-free.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-closures-use-after-free.rs b/src/test/ui/borrowck/borrowck-closures-use-after-free.rs new file mode 100644 index 000000000..be5f1f873 --- /dev/null +++ b/src/test/ui/borrowck/borrowck-closures-use-after-free.rs @@ -0,0 +1,23 @@ +// Tests that a closure which mutates a local variable +// cannot also be supplied a borrowed version of that +// variable's contents. Issue #11192. + +struct Foo { + x: isize +} + +impl Drop for Foo { + fn drop(&mut self) { + println!("drop {}", self.x); + } +} + + + +fn main() { + let mut ptr: Box<_> = Box::new(Foo { x: 0 }); + let mut test = |foo: &Foo| { + ptr = Box::new(Foo { x: ptr.x + 1 }); + }; + test(&*ptr); //~ ERROR cannot borrow `*ptr` +} |