warning: unnecessary `unsafe` block
  --> $DIR/pat-unsafe.rs:16:17
   |
LL |                 unsafe {}
   |                 ^^^^^^ unnecessary `unsafe` block
   |
note: the lint level is defined here
  --> $DIR/pat-unsafe.rs:4:9
   |
LL | #![warn(unused_unsafe)]
   |         ^^^^^^^^^^^^^

warning: unnecessary `unsafe` block
  --> $DIR/pat-unsafe.rs:23:17
   |
LL |                 unsafe {}
   |                 ^^^^^^ unnecessary `unsafe` block

warning: 2 warnings emitted