PVS-Studio warning V579 for Chromium

TEST_F(OnDiskSyncableDirectoryTest, TestShareInfo) {
  dir_->set_store_birthday("Jan 31st");
  const char* const bag_of_chips_array = "\0bag of chips";
  const std::string bag_of_chips_string =
    std::string(bag_of_chips_array, sizeof(bag_of_chips_array));
  ....
}

This suspicious code was found in Chromium project by PVS-Studio static code analyzer.
Warning message is:
V579 The string function receives the pointer and its size as arguments. It is possibly a mistake. Inspect the second argument. syncable_unittest.cc 1790

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