Fix --verify-on-transition for OSR and concurrent sweep.

runtime/vm/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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 14545 matching lines @@
   // frame slots which are marked as having objects.
   *maps = stackmaps();
   *map = Stackmap::null();
   for (intptr_t i = 0; i < maps->Length(); i++) {
     *map ^= maps->At(i);
     ASSERT(!map->IsNull());
     if (map->PcOffset() == pc_offset) {
       return map->raw();  // We found a stack map for this frame.
     }
   }
-  ASSERT(!is_optimized());
+  ASSERT(!is_optimized() || (pc_offset == Instructions::kUncheckedEntryOffset));
   return Stackmap::null();
 }
 
 
 intptr_t Code::GetCallerId(intptr_t inlined_id) const {
   if (inlined_id < 0) {
     return -1;
   }
   const Array& map = Array::Handle(GetInlinedCallerIdMap());
   if (map.IsNull() || (map.Length() == 0)) {
@@ skipping 8428 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart