Don't allow oob message interrupts while executing constant expressions in the parser.

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 1448 matching lines @@
 
 RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
 #ifdef DART_PRECOMPILER
   if (FLAG_precompilation) {
     return Precompiler::ExecuteOnce(fragment);
   }
 #endif
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     Thread* const thread = Thread::Current();
+
+    // Don't allow message interrupts while executing constant
+    // expressions.  They can cause bogus recursive compilation.
+    NoOOBMessageScope no_msg_scope(thread);
     if (FLAG_trace_compiler) {
       THR_Print("compiling expression: ");
       if (FLAG_support_ast_printer) {
         AstPrinter::PrintNode(fragment);
       }
     }
 
     // Create a dummy function object for the code generator.
     // The function needs to be associated with a named Class: the interface
     // Function fits the bill.
@@ skipping 406 matching lines @@
 }
 
 
 void BackgroundCompiler::EnsureInit(Thread* thread) {
   UNREACHABLE();
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart