diff options
Diffstat (limited to 'src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs')
-rw-r--r-- | src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs b/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs deleted file mode 100644 index cff9e963e..000000000 --- a/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs +++ /dev/null @@ -1,30 +0,0 @@ -// This is testing an attempt to corrupt the discriminant of the match -// arm in a guard, followed by an attempt to continue matching on that -// corrupted discriminant in the remaining match arms. -// -// Basically this is testing that our new NLL feature of emitting a -// fake read on each match arm is catching cases like this. -// -// This case is interesting because a borrow of **x is untracked, because **x is -// immutable. However, for matches we care that **x refers to the same value -// until we have chosen a match arm. - -struct ForceFnOnce; -fn main() { - let mut x = &mut &Some(&2); - let force_fn_once = ForceFnOnce; - match **x { - None => panic!("unreachable"), - Some(&_) if { - // ForceFnOnce needed to exploit #27282 - (|| { *x = &None; drop(force_fn_once); })(); - //~^ ERROR cannot mutably borrow `x` in match guard [E0510] - false - } => {} - Some(&a) if { // this binds to garbage if we've corrupted discriminant - println!("{}", a); - panic!() - } => {} - _ => panic!("unreachable"), - } -} |