output: #fixed code
                                  public void release(final boolean reportMemoryLeaks) {
          if (isReleased()) {
              return;
          }
          checkThread();
          releaseResources();
          shutdownExecutors(forceTerminateExecutors);
          if (executors != null) {
              executors.clear();
          }
          synchronized (lock) {
              runtimeCounter--;
          }
          _releaseRuntime(v8RuntimePtr);
          v8RuntimePtr = 0L;
          released = true;
          if (reportMemoryLeaks && (objectReferences > 0)) {
              throw new IllegalStateException(objectReferences + " Object(s) still exist in runtime");
          }
      }
input: #vulnerable code 
                                  public void release(final boolean reportMemoryLeaks) {
          if (isReleased()) {
              return;
          }
          checkThread();
          if (debugEnabled) {
              disableDebugSupport();
          }
          releaseResources();
          shutdownExecutors(forceTerminateExecutors);
          if (executors != null) {
              executors.clear();
          }
          synchronized (lock) {
              runtimeCounter--;
          }
          _releaseRuntime(v8RuntimePtr);
          v8RuntimePtr = 0L;
          released = true;
          if (reportMemoryLeaks && (objectReferences > 0)) {
              throw new IllegalStateException(objectReferences + " Object(s) still exist in runtime");
          }
      } 
                              #location 7 
                              #vulnerability type THREAD_SAFETY_VIOLATION