tests/ui/pattern/manually-drop-dangling-ref.stderr

error: constant DATA cannot be used as pattern
  --> $DIR/manually-drop-dangling-ref.rs:5:12
   |
LL |     if let DATA = DATA {}
   |            ^^^^
   |
   = note: constants that reference mutable or external memory or that contain dangling references cannot be used as patterns

error: aborting due to 1 previous error