enable panic-catching tests in Miri

Author: RalfJung

src/liballoc/tests/binary_heap.rs

@@ -347,7 +347,7 @@ fn assert_covariance() {
 // Destructors must be called exactly once per element.
 // FIXME: re-enable emscripten once it can unwind again
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))] // Miri does not support catching panics
+#[cfg(not(target_os = "emscripten"))]
 fn panic_safe() {
     use std::cmp;
     use std::panic::{self, AssertUnwindSafe};

src/liballoc/tests/vec.rs

@@ -944,10 +944,9 @@ fn drain_filter_complex() {
     }
 }
 
-// Miri does not support catching panics
 // FIXME: re-enable emscripten once it can unwind again
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))]
+#[cfg(not(target_os = "emscripten"))]
 fn drain_filter_consumed_panic() {
     use std::rc::Rc;
     use std::sync::Mutex;
@@ -999,7 +998,7 @@ fn drain_filter_consumed_panic() {
 
 // FIXME: Re-enable emscripten once it can catch panics
 #[test]
-#[cfg(not(any(miri, target_os = "emscripten")))] // Miri does not support catching panics
+#[cfg(not(target_os = "emscripten"))]
 fn drain_filter_unconsumed_panic() {
     use std::rc::Rc;
     use std::sync::Mutex;