Report an error if a const constructor calls a non-const constructor.

sdk/lib/_internal/compiler/implementation/resolution/members.dart

Index: sdk/lib/_internal/compiler/implementation/resolution/members.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/resolution/members.dart	(revision 25202)
+++ sdk/lib/_internal/compiler/implementation/resolution/members.dart	(working copy)
@@ -1087,7 +1087,8 @@
 
     final bool isImplicitSuperCall = false;
     final SourceString className = lookupTarget.name;
-    verifyThatConstructorMatchesCall(calledConstructor,
+    verifyThatConstructorMatchesCall(constructor,
+                                     calledConstructor,
                                      selector,
                                      isImplicitSuperCall,
                                      call,
@@ -1124,7 +1125,8 @@
 
       final SourceString className = lookupTarget.name;
       final bool isImplicitSuperCall = true;
-      verifyThatConstructorMatchesCall(calledConstructor,
+      verifyThatConstructorMatchesCall(constructor,
+                                       calledConstructor,
                                        callToMatch,
                                        isImplicitSuperCall,
                                        functionNode,
@@ -1136,6 +1138,7 @@
   }
 
   void verifyThatConstructorMatchesCall(
+      FunctionElement caller,
       FunctionElement lookedupConstructor,
       Selector call,
       bool isImplicitSuperCall,
@@ -1159,6 +1162,10 @@
                            ? MessageKind.NO_MATCHING_CONSTRUCTOR_FOR_IMPLICIT
                            : MessageKind.NO_MATCHING_CONSTRUCTOR;
         visitor.compiler.reportErrorCode(diagnosticNode, kind);
+      } else if (caller.modifiers.isConst()
+                 && !lookedupConstructor.modifiers.isConst()) {
+        visitor.compiler.reportErrorCode(
+            diagnosticNode, MessageKind.CONST_CALLS_NON_CONST);
       }
     }
   }