Add Debug impl and erase region for TypedConstVal

Author: fhahn

src/librustc/mir/repr.rs

@@ -891,13 +891,20 @@ pub struct Constant<'tcx> {
     pub literal: Literal<'tcx>,
 }
 
-#[derive(Clone, Debug, RustcEncodable, RustcDecodable)]
+#[derive(Clone, RustcEncodable, RustcDecodable)]
 pub struct TypedConstVal<'tcx> {
     pub ty: Ty<'tcx>,
     pub span: Span,
     pub value: ConstVal
 }
 
+impl<'tcx> Debug for TypedConstVal<'tcx> {
+    fn fmt(&self, fmt: &mut Formatter) -> fmt::Result {
+        try!(write!(fmt, "const "));
+        fmt_const_val(fmt, &self.value)
+    }
+}
+
 #[derive(Clone, Copy, Debug, PartialEq, RustcEncodable, RustcDecodable)]
 pub enum ItemKind {
     Constant,

src/librustc_mir/transform/erase_regions.rs

@@ -143,8 +143,9 @@ impl<'a, 'tcx> EraseRegions<'a, 'tcx> {
             Rvalue::Use(ref mut operand) => {
                 self.erase_regions_operand(operand)
             }
-            Rvalue::Repeat(ref mut operand, _) => {
+            Rvalue::Repeat(ref mut operand, ref mut value) => {
                 self.erase_regions_operand(operand);
+                value.ty = self.tcx.erase_regions(&value.ty);
             }
             Rvalue::Ref(ref mut region, _, ref mut lvalue) => {
                 *region = ty::ReStatic;