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3 files changed, 56 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-closures-mut-of-mut.nll.stderr b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.nll.stderr new file mode 100644 index 00000000000..18f95f232cd --- /dev/null +++ b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.nll.stderr @@ -0,0 +1,18 @@ +error[E0524]: two closures require unique access to `x` at the same time + --> $DIR/borrowck-closures-mut-of-mut.rs:14:18 + | +LL | let mut c1 = || set(&mut *x); + | -- - first borrow occurs due to use of `x` in closure + | | + | first closure is constructed here +LL | let mut c2 = || set(&mut *x); + | ^^ - second borrow occurs due to use of `x` in closure + | | + | second closure is constructed here +LL | //~^ ERROR two closures require unique access to `x` at the same time +LL | c2(); c1(); + | -- first borrow later used here + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0524`. diff --git a/src/test/ui/borrowck/borrowck-closures-mut-of-mut.rs b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.rs new file mode 100644 index 00000000000..50c6f2c585e --- /dev/null +++ b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.rs @@ -0,0 +1,20 @@ +// Tests that two closures cannot simultaneously both have mutable +// access to the variable. Related to issue #6801. + +fn get(x: &isize) -> isize { + *x +} + +fn set(x: &mut isize) { + *x = 4; +} + +fn a(x: &mut isize) { + let mut c1 = || set(&mut *x); + let mut c2 = || set(&mut *x); + //~^ ERROR two closures require unique access to `x` at the same time + c2(); c1(); +} + +fn main() { +} diff --git a/src/test/ui/borrowck/borrowck-closures-mut-of-mut.stderr b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.stderr new file mode 100644 index 00000000000..2c5587710a1 --- /dev/null +++ b/src/test/ui/borrowck/borrowck-closures-mut-of-mut.stderr @@ -0,0 +1,18 @@ +error[E0524]: two closures require unique access to `x` at the same time + --> $DIR/borrowck-closures-mut-of-mut.rs:14:18 + | +LL | let mut c1 = || set(&mut *x); + | -- - previous borrow occurs due to use of `x` in closure + | | + | first closure is constructed here +LL | let mut c2 = || set(&mut *x); + | ^^ - borrow occurs due to use of `x` in closure + | | + | second closure is constructed here +... +LL | } + | - borrow from first closure ends here + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0524`. |