Another attempt to fix LLVM 4.2 failure.

runtime/vm/raw_object.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/raw_object.h"
 
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
@@ skipping 479 matching lines @@
     uword end_pc = start_pc + raw_instr->ptr()->size_;
     ASSERT(end_pc > start_pc);
     if ((pc >= start_pc) && (pc < end_pc)) {
       return true;
     }
   }
   return false;
 }
 
 
+intptr_t RawPcDescriptors::RecordSize(bool has_try_index) {
+  return has_try_index ? RawPcDescriptors::kFullRecSize
+                       : RawPcDescriptors::kCompressedRecSize;
+}
+
+
 intptr_t RawPcDescriptors::VisitPcDescriptorsPointers(
     RawPcDescriptors* raw_obj, ObjectPointerVisitor* visitor) {
   return PcDescriptors::InstanceSize(raw_obj->ptr()->length_,
                                      raw_obj->ptr()->record_size_in_bytes_);
 }
 
 
 intptr_t RawStackmap::VisitStackmapPointers(RawStackmap* raw_obj,
                                             ObjectPointerVisitor* visitor) {
   return Stackmap::InstanceSize(raw_obj->ptr()->length_);
@@ skipping 358 matching lines @@
 intptr_t RawUserTag::VisitUserTagPointers(
     RawUserTag* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return UserTag::InstanceSize();
 }
 
 
 }  // namespace dart