Convert legitimate failing errors to the new error format

Author: bjorn3

src/lib.rs

@@ -249,6 +249,7 @@ pub fn eval_main<'a, 'tcx: 'a>(
         Ok(()) => {
             let leaks = ecx.memory().leak_report();
             if leaks != 0 {
+                // TODO: Prevent leaks which aren't supposed to be there
                 //tcx.sess.err("the evaluated program leaked memory");
             }
         }

tests/compile-fail/match_char.rs

@@ -1,6 +1,7 @@
 fn main() {
     assert!(std::char::from_u32(-1_i32 as u32).is_none());
-    match unsafe { std::mem::transmute::<i32, char>(-1) } { //~ERROR tried to interpret an invalid 32-bit value as a char: 4294967295
+    match unsafe { std::mem::transmute::<i32, char>(-1) } { //~ ERROR constant evaluation error [E0080]
+        //~^ NOTE tried to interpret an invalid 32-bit value as a char: 4294967295
         'a' => {},
         'b' => {},
         _ => {},

tests/compile-fail/overflowing-rsh-2.rs

@@ -12,5 +12,6 @@
 
 fn main() {
     // Make sure we catch overflows that would be hidden by first casting the RHS to u32
-    let _n = 1i64 >> (u32::max_value() as i64 + 1); //~ Overflow(Shr)
+    let _n = 1i64 >> (u32::max_value() as i64 + 1); //~ ERROR constant evaluation error [E0080]
+    //~^ NOTE suiriuruihrihue
 }

tests/compile-fail/repeat.rs

@@ -3,7 +3,8 @@ static X: usize = 5;
 #[allow(mutable_transmutes)]
 fn main() {
     unsafe {
-        *std::mem::transmute::<&usize, &mut usize>(&X) = 6; //~ ERROR: tried to modify constant memory
+        *std::mem::transmute::<&usize, &mut usize>(&X) = 6; //~ ERROR constant evaluation error [E0080]
+        //~^ NOTE tried to modify constant memory
         assert_eq!(X, 6);
     }
 }