Do not leak message object beyond try-catch.

src/full-codegen.cc

Index: src/full-codegen.cc
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index 4ea455edfe9d2f1ac9c0b4f0109cb69d8297ea24..a25669777144553769883aa0d97b6c4b96d261c4 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -1182,6 +1182,8 @@ void FullCodeGenerator::VisitTryCatchStatement(TryCatchStatement* stmt) {
   Label try_entry, handler_entry, exit;
   __ jmp(&try_entry);
   __ bind(&handler_entry);
+
+  ClearPendingMessage();
   // Exception handler code, the exception is in the result register.
   // Extend the context before executing the catch block.
   { Comment cmnt(masm_, "[ Extend catch context");