Fix issue 3874: non-deterministic AST generation caused by exceptions being thrown during parsing (…

runtime/vm/flow_graph_inliner.cc

 // Copyright (c) 2013, 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/flow_graph_inliner.h"
 
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 972 matching lines @@
     if (target.raw() == non_inlined_variants_[i].target->raw()) {
       return true;
     }
   }
 
   return false;
 }
 
 
 bool PolymorphicInliner::TryInlining(const Function& target) {
+  if (!target.is_optimizable()) {
+    return false;
+  }
   GrowableArray<Value*> arguments(call_->ArgumentCount());
   for (int i = 0; i < call_->ArgumentCount(); ++i) {
     arguments.Add(call_->PushArgumentAt(i)->value());
   }
   InlinedCallData call_data(call_, &arguments);
   if (!owner_->TryInlining(target,
                            call_->instance_call()->argument_names(),
                            &call_data)) {
     return false;
   }
@@ skipping 336 matching lines @@
         OS::Print("After Inlining of %s\n", flow_graph_->
                   parsed_function().function().ToFullyQualifiedCString());
         FlowGraphPrinter printer(*flow_graph_);
         printer.PrintBlocks();
       }
     }
   }
 }
 
 }  // namespace dart