warning: unnecessary `unsafe` block
  --> $DIR/pat-unsafe.rs:19:17
   |
LL |     unsafe {
   |     ------ because it's nested under this `unsafe` block
...
LL |                 unsafe {}
   |                 ^^^^^^ unnecessary `unsafe` block
   |
note: the lint level is defined here
  --> $DIR/pat-unsafe.rs:7:9
   |
LL | #![warn(unused_unsafe)]
   |         ^^^^^^^^^^^^^

warning: unnecessary `unsafe` block
  --> $DIR/pat-unsafe.rs:26:17
   |
LL |     unsafe {
   |     ------ because it's nested under this `unsafe` block
...
LL |                 unsafe {}
   |                 ^^^^^^ unnecessary `unsafe` block

warning: 2 warnings emitted