Do not leak message object beyond try-catch.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 7d575d870ef9e4e2288d32b377a40594bec1d0ed..2e6c417787945dd9c578f9718be53e9b6d5b58ae 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -5279,6 +5279,8 @@ void FullCodeGenerator::EnterFinallyBlock() {
       ExternalReference::address_of_pending_message_obj(isolate());
   __ mov(edx, Operand::StaticVariable(pending_message_obj));
   __ push(edx);
+
+  ClearPendingMessage();
 }
 
 
@@ -5301,6 +5303,15 @@ void FullCodeGenerator::ExitFinallyBlock() {
 }
 
 
+void FullCodeGenerator::ClearPendingMessage() {
+  DCHECK(!result_register().is(edx));
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ mov(edx, Immediate(isolate()->factory()->the_hole_value()));
+  __ mov(Operand::StaticVariable(pending_message_obj), edx);
+}
+
+
 #undef __