message: re-enable mir-opt tests
diff: @@ -43,8 +43,7 @@ function run_tests {
  # optimizations up all the way, too).
  # Optimizations change diagnostics (mostly backtraces), so we don't check
  # them. Also error locations change so we don't run the failing tests.
  - #FIXME: temporarily disabled due to <https://github.com/rust-lang/rust/issues/107511>.
  - #MIRIFLAGS="${MIRIFLAGS:-} -O -Zmir-opt-level=4" MIRI_SKIP_UI_CHECKS=1 ./miri test -- tests/{pass,panic}
  + MIRIFLAGS="${MIRIFLAGS:-} -O -Zmir-opt-level=4" MIRI_SKIP_UI_CHECKS=1 ./miri test -- tests/{pass,panic}
  # Also run some many-seeds tests. 64 seeds means this takes around a minute per test.
  for FILE in tests/many-seeds/*.rs; do
  