Fix crash when --ll_prof is enabled after cb29f9c

src/snapshot/deserializer.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/snapshot/deserializer.h"
 
 #include "src/bootstrapper.h"
 #include "src/heap/heap.h"
 #include "src/isolate.h"
 #include "src/macro-assembler.h"
@@ skipping 346 matching lines @@
     address = obj->address();
     next_alignment_ = kWordAligned;
   } else {
     address = Allocate(space_number, size);
     obj = HeapObject::FromAddress(address);
   }
 
   isolate_->heap()->OnAllocationEvent(obj, size);
   Object** current = reinterpret_cast<Object**>(address);
   Object** limit = current + (size >> kPointerSizeLog2);
-  if (FLAG_log_snapshot_positions) {
-    LOG(isolate_, SnapshotPositionEvent(address, source_.position()));
-  }
+  int position = source_.position();
 
   if (ReadData(current, limit, space_number, address)) {
     // Only post process if object content has not been deferred.
     obj = PostProcessNewObject(obj, space_number);
   }
+  if (FLAG_log_snapshot_positions) {
+    LOG(isolate_, SnapshotPositionEvent(obj, position));
+  }
 
   Object* write_back_obj = obj;
   UnalignedCopy(write_back, &write_back_obj);
 #ifdef DEBUG
   if (obj->IsCode()) {
     DCHECK(space_number == CODE_SPACE || space_number == LO_SPACE);
   } else {
     DCHECK(space_number != CODE_SPACE);
   }
 #endif  // DEBUG
@@ skipping 418 matching lines @@
 
       default:
         CHECK(false);
     }
   }
   CHECK_EQ(limit, current);
   return true;
 }
 }  // namespace internal
 }  // namespace v8