code review 7392053: exp/ssa: a number of bug fixes.

src/pkg/exp/ssa/interp/value.go

Index: src/pkg/exp/ssa/interp/value.go
===================================================================
--- a/src/pkg/exp/ssa/interp/value.go
+++ b/src/pkg/exp/ssa/interp/value.go
@@ -226,10 +226,8 @@
 		return x == y.(*hashmap)
 	case map[value]value:
 		return (x != nil) == (y.(map[value]value) != nil)
-	case *ssa.Function:
-		return x == y.(*ssa.Function)
-	case *closure:
-		return x == y.(*closure)
+	case *ssa.Function, *closure:
+		return x == y
 	case []value:
 		return (x != nil) == (y.([]value) != nil)
 	}