Fix http://dartbug.com/23290

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
===================================================================
--- runtime/vm/code_generator.cc	(revision 45386)
+++ runtime/vm/code_generator.cc	(working copy)
@@ -1439,14 +1439,21 @@
 
 void DeoptimizeAt(const Code& optimized_code, uword pc) {
   ASSERT(optimized_code.is_optimized());
+  Thread* thread = Thread::Current();
+  Zone* zone = thread->zone();
   ICData::DeoptReasonId deopt_reason = ICData::kDeoptUnknown;
   uint32_t deopt_flags = 0;
-  const TypedData& deopt_info = TypedData::Handle(
+  const TypedData& deopt_info = TypedData::Handle(zone,
       optimized_code.GetDeoptInfoAtPc(pc, &deopt_reason, &deopt_flags));
   ASSERT(!deopt_info.IsNull());
-  const Function& function = Function::Handle(optimized_code.function());
-  Compiler::EnsureUnoptimizedCode(Thread::Current(), function);
-  const Code& unoptimized_code = Code::Handle(function.unoptimized_code());
+  const Function& function = Function::Handle(zone, optimized_code.function());
+  const Error& error =
+      Error::Handle(zone, Compiler::EnsureUnoptimizedCode(thread, function));
+  if (!error.IsNull()) {
+    Exceptions::PropagateError(error);
+  }
+  const Code& unoptimized_code =
+      Code::Handle(zone, function.unoptimized_code());
   ASSERT(!unoptimized_code.IsNull());
   // The switch to unoptimized code may have already occurred.
   if (function.HasOptimizedCode()) {
@@ -1457,7 +1464,7 @@
   uword lazy_deopt_jump = optimized_code.GetLazyDeoptPc();
   ASSERT(lazy_deopt_jump != 0);
   const Instructions& instrs =
-      Instructions::Handle(optimized_code.instructions());
+      Instructions::Handle(zone, optimized_code.instructions());
   {
     WritableInstructionsScope writable(instrs.EntryPoint(), instrs.size());
     CodePatcher::InsertCallAt(pc, lazy_deopt_jump);