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-rw-r--r--src/test/ui/nll/issue-27282-mutate-before-diverging-arm-2.rs40
1 files changed, 0 insertions, 40 deletions
diff --git a/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-2.rs b/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-2.rs
deleted file mode 100644
index 9c3e7e997..000000000
--- a/src/test/ui/nll/issue-27282-mutate-before-diverging-arm-2.rs
+++ /dev/null
@@ -1,40 +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 it includes a guard that
-// diverges, and therefore a single final fake-read at the very end
-// after the final match arm would not suffice.
-//
-// It is also interesting because the access to the corrupted data
-// occurs in the pattern-match itself, and not in the guard
-// expression.
-
-struct ForceFnOnce;
-
-fn main() {
- let mut x = &mut Some(&2);
- let force_fn_once = ForceFnOnce;
- match x {
- &mut None => panic!("unreachable"),
- &mut Some(&_)
- if {
- // ForceFnOnce needed to exploit #27282
- (|| { *x = None; drop(force_fn_once); })();
- //~^ ERROR cannot mutably borrow `x` in match guard [E0510]
- false
- } => {}
-
- // this segfaults if we corrupted the discriminant, because
- // the compiler gets to *assume* that it cannot be the `None`
- // case, even though that was the effect of the guard.
- &mut Some(&2)
- if {
- panic!()
- } => {}
- _ => panic!("unreachable"),
- }
-}