Fix a throw returning to a frame marked for lazy deopt that captures the stacktrace.

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
diff --git a/runtime/vm/flow_graph_compiler.cc b/runtime/vm/flow_graph_compiler.cc
index 4e0d2c773a9e85398e0f0a3c5988db5f30b6b7c4..36fc09820805fbc0f2f71edf9e87a534c8004757 100644
--- a/runtime/vm/flow_graph_compiler.cc
+++ b/runtime/vm/flow_graph_compiler.cc
@@ -225,7 +225,8 @@ FlowGraphCompiler::FlowGraphCompiler(
                 LookupClass(Symbols::List()))),
         parallel_move_resolver_(this),
         pending_deoptimization_env_(NULL),
-        lazy_deopt_pc_offset_(Code::kInvalidPc),
+        lazy_deopt_return_pc_offset_(Code::kInvalidPc),
+        lazy_deopt_throw_pc_offset_(Code::kInvalidPc),
         deopt_id_to_ic_data_(NULL),
         edge_counters_array_(Array::ZoneHandle()),
         inlined_code_intervals_(Array::ZoneHandle(Object::empty_array().raw())),
@@ -1030,7 +1031,8 @@ void FlowGraphCompiler::FinalizePcDescriptors(const Code& code) {
       pc_descriptors_list_->FinalizePcDescriptors(code.PayloadStart()));
   if (!is_optimizing_) descriptors.Verify(parsed_function_.function());
   code.set_pc_descriptors(descriptors);
-  code.set_lazy_deopt_pc_offset(lazy_deopt_pc_offset_);
+  code.set_lazy_deopt_return_pc_offset(lazy_deopt_return_pc_offset_);
+  code.set_lazy_deopt_throw_pc_offset(lazy_deopt_throw_pc_offset_);
 }