mark failures expected due to panics

src/libcore/tests/iter.rs

@@ -255,7 +255,7 @@ fn test_iterator_step_by_nth_overflow() {
 
 #[test]
 #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_iterator_step_by_zero() {
     let mut it = (0..).step_by(0);
     it.next();
@@ -1417,7 +1417,7 @@ fn test_rposition() {
 
 #[test]
 #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_rposition_panic() {
     let v: [(Box<_>, Box<_>); 4] =
         [(box 0, box 0), (box 0, box 0),

src/libcore/tests/option.rs

@@ -69,7 +69,7 @@ fn test_option_dance() {
 }
 
 #[test] #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_option_too_much_dance() {
     struct A;
     let mut y = Some(A);
@@ -130,7 +130,7 @@ fn test_unwrap() {
 
 #[test]
 #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_unwrap_panic1() {
     let x: Option<isize> = None;
     x.unwrap();
@@ -138,7 +138,7 @@ fn test_unwrap_panic1() {
 
 #[test]
 #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_unwrap_panic2() {
     let x: Option<String> = None;
     x.unwrap();

src/libcore/tests/result.rs

@@ -117,7 +117,7 @@ fn test_unwrap_or_else() {
 
 #[test]
 #[should_panic]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 pub fn test_unwrap_or_else_panic() {
     fn handler(msg: &'static str) -> isize {
         if msg == "I got this." {
@@ -139,7 +139,7 @@ pub fn test_expect_ok() {
 }
 #[test]
 #[should_panic(expected="Got expected error: \"All good\"")]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 pub fn test_expect_err() {
     let err: Result<isize, &'static str> = Err("All good");
     err.expect("Got expected error");
@@ -153,7 +153,7 @@ pub fn test_expect_err_err() {
 }
 #[test]
 #[should_panic(expected="Got expected ok: \"All good\"")]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 pub fn test_expect_err_ok() {
     let err: Result<&'static str, isize> = Ok("All good");
     err.expect_err("Got expected ok");

src/libcore/tests/slice.rs

@@ -782,7 +782,7 @@ mod slice_index {
     //  to be used in `should_panic`)
     #[test]
     #[should_panic(expected = "out of range")]
-    #[cfg(not(miri))]
+    #[cfg(not(miri))] // Miri does not support panics
     fn assert_range_eq_can_fail_by_panic() {
         assert_range_eq!([0, 1, 2], 0..5, [0, 1, 2]);
     }
@@ -792,7 +792,7 @@ mod slice_index {
     //  to be used in `should_panic`)
     #[test]
     #[should_panic(expected = "==")]
-    #[cfg(not(miri))]
+    #[cfg(not(miri))] // Miri does not support panics
     fn assert_range_eq_can_fail_by_inequality() {
         assert_range_eq!([0, 1, 2], 0..2, [0, 1, 2]);
     }
@@ -842,7 +842,7 @@ mod slice_index {
 
                 #[test]
                 #[should_panic(expected = $expect_msg)]
-                #[cfg(not(miri))]
+                #[cfg(not(miri))] // Miri does not support panics
                 fn index_fail() {
                     let v = $data;
                     let v: &[_] = &v;
@@ -851,7 +851,7 @@ mod slice_index {
 
                 #[test]
                 #[should_panic(expected = $expect_msg)]
-                #[cfg(not(miri))]
+                #[cfg(not(miri))] // Miri does not support panics
                 fn index_mut_fail() {
                     let mut v = $data;
                     let v: &mut [_] = &mut v;
@@ -1306,7 +1306,7 @@ fn test_copy_within() {
 
 #[test]
 #[should_panic(expected = "src is out of bounds")]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_copy_within_panics_src_too_long() {
     let mut bytes = *b"Hello, World!";
     // The length is only 13, so 14 is out of bounds.
@@ -1315,7 +1315,7 @@ fn test_copy_within_panics_src_too_long() {
 
 #[test]
 #[should_panic(expected = "dest is out of bounds")]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_copy_within_panics_dest_too_long() {
     let mut bytes = *b"Hello, World!";
     // The length is only 13, so a slice of length 4 starting at index 10 is out of bounds.
@@ -1323,7 +1323,7 @@ fn test_copy_within_panics_dest_too_long() {
 }
 #[test]
 #[should_panic(expected = "src end is before src start")]
-#[cfg(not(miri))]
+#[cfg(not(miri))] // Miri does not support panics
 fn test_copy_within_panics_src_inverted() {
     let mut bytes = *b"Hello, World!";
     // 2 is greater than 1, so this range is invalid.