More shared messages.

pkg/compiler/lib/src/resolution/members.dart

Index: pkg/compiler/lib/src/resolution/members.dart
diff --git a/pkg/compiler/lib/src/resolution/members.dart b/pkg/compiler/lib/src/resolution/members.dart
index 1aa2d17ebba2e53bce1bfa0248507f6d225fbb42..d2e2f6e35b5e6d7c288f7d2ebf6f4557a3bd046e 100644
--- a/pkg/compiler/lib/src/resolution/members.dart
+++ b/pkg/compiler/lib/src/resolution/members.dart
@@ -3658,9 +3658,9 @@ class ResolverVisitor extends MappingVisitor<ResolutionResult> {
   }
 
   ResolutionResult visitRethrow(Rethrow node) {
-    if (!inCatchBlock) {
+    if (!inCatchBlock && node.throwToken.stringValue == 'rethrow') {
       reporter.reportErrorMessage(
-          node, MessageKind.THROW_WITHOUT_EXPRESSION);
+          node, MessageKind.RETHROW_OUTSIDE_CATCH);
     }
     return const NoneResult();
   }