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-rw-r--r--src/test/ui/nll/issue-27282-mutate-before-diverging-arm-3.rs30
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"),
- }
-}