diff options
Diffstat (limited to 'tests/ui/borrowck/borrowck-bad-nested-calls-move.rs')
-rw-r--r-- | tests/ui/borrowck/borrowck-bad-nested-calls-move.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-bad-nested-calls-move.rs b/tests/ui/borrowck/borrowck-bad-nested-calls-move.rs new file mode 100644 index 000000000..b2afb6391 --- /dev/null +++ b/tests/ui/borrowck/borrowck-bad-nested-calls-move.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: Box<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 moved when evaluating the second + // argument! + add( + &*a, + a); //~ ERROR cannot move +} + +fn explicit() { + let mut a: Box<_> = Box::new(1); + add( + &*a, + a); //~ ERROR cannot move +} + +fn main() {} |