Disable guessing 'other' cid; this prevents an issue in range analysis. It is not clear if guessing…

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 53 matching lines @@
 DEFINE_FLAG(bool, verify_compiler, false,
     "Enable compiler verification assertions");
 
 DECLARE_FLAG(bool, trace_failed_optimization_attempts);
 DECLARE_FLAG(bool, trace_inlining_intervals);
 DECLARE_FLAG(bool, trace_irregexp);
 DECLARE_FLAG(bool, trace_patching);
 
 
 bool Compiler::always_optimize_ = false;
-bool Compiler::guess_other_cid_ = true;
 
 
 // TODO(zerny): Factor out unoptimizing/optimizing pipelines and remove
 // separate helpers functions & `optimizing` args.
 class CompilationPipeline : public ZoneAllocated {
  public:
   static CompilationPipeline* New(Zone* zone, const Function& function);
 
   virtual void ParseFunction(ParsedFunction* parsed_function) = 0;
   virtual FlowGraph* BuildFlowGraph(
@@ skipping 1250 matching lines @@
     const Object& result =
       PassiveObject::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart