VM: Fix crash when a type error is encountered while evaluating metadata in checked mode.

runtime/vm/parser.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/parser.h"
 
 #include "lib/invocation_mirror.h"
 #include "platform/utils.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
@@ skipping 8927 matching lines @@
   const Array& args_descriptor =
       Array::Handle(ArgumentsDescriptor::New(num_arguments,
                                              arguments->names()));
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(constructor,
                                                arg_values,
                                                args_descriptor));
   if (result.IsError()) {
       // An exception may not occur in every parse attempt, i.e., the
       // generated AST is not deterministic. Therefore mark the function as
-      // not optimizable.
-      current_function().SetIsOptimizable(false);
+      // not optimizable. Unless we are evaluating metadata, in which case there
+      // is no current function.
+      if (!parsing_metadata_) {
+        current_function().SetIsOptimizable(false);
+      }
       if (result.IsUnhandledException()) {
         return result.raw();
       } else {
         isolate()->long_jump_base()->Jump(1, Error::Cast(result));
         UNREACHABLE();
         return Object::null();
       }
   } else {
     if (constructor.IsFactory()) {
       // The factory method returns the allocated object.
@@ skipping 1831 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart