PVS-Studio warning V519 for WebKit

bool ScriptDebugServer::executeSkipPauseRequest(....)
{
  const char* v8MethodName;
  switch (request)
  {
    case ScriptDebugListener::NoSkip:
      return false;
    case ScriptDebugListener::Continue:
      return true;
    case ScriptDebugListener::StepInto:
      v8MethodName = stepIntoV8MethodName;
    case ScriptDebugListener::StepOut:
      v8MethodName = stepOutV8MethodName;
  }
  v8::Handle<v8::Value> argv[] = { executionState };
  callDebuggerMethod(stepIntoV8MethodName, 1, argv);
  return true;
}

This suspicious code was found in WebKit project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'v8MethodName' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 412, 414. ScriptDebugServer.cpp 414

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/