output: #fixed code
                                  public void prepareBasic() throws Exception {
          // 检查ClassLoader的情况
          if (ctx.getClassLoader() == null)
              ctx.setClassLoader(NbApp.class.getClassLoader());
          
          if (ctx.getEnvHolder() == null) {
              ctx.setEnvHolder(new SystemPropertiesEnvHolder());
          }
          
          // 看看日志应该用哪个
          String logAdapter = ctx.getEnvHolder().get("nutz.boot.base.LogAdapter");
          if (!Strings.isBlank(logAdapter)) {
              Logs.setAdapter((LogAdapter) ctx.getClassLoader().loadClass(logAdapter).newInstance());
          }
          log = Logs.get();
          // 资源加载器
          if (ctx.getResourceLoader() == null) {
              ResourceLoader resourceLoader = new SimpleResourceLoader();
              aware(resourceLoader);
              ctx.setResourceLoader(resourceLoader);
          }
      }
input: #vulnerable code 
                                  public void prepareBasic() throws Exception {
      	if (this.ctx == null) {
              ctx = AppContext.getDefault();
          }
          if (ctx.getMainClass() == null && mainClass != null)
              ctx.setMainClass(mainClass);
          // 检查ClassLoader的情况
          if (ctx.getClassLoader() == null)
              ctx.setClassLoader(NbApp.class.getClassLoader());
          
          if (ctx.getEnvHolder() == null) {
              ctx.setEnvHolder(new SystemPropertiesEnvHolder());
          }
          
          // 看看日志应该用哪个
          String logAdapter = ctx.getEnvHolder().get("nutz.boot.base.LogAdapter");
          if (!Strings.isBlank(logAdapter)) {
              Logs.setAdapter((LogAdapter) ctx.getClassLoader().loadClass(logAdapter).newInstance());
          }
          log = Logs.get();
          // 资源加载器
          if (ctx.getResourceLoader() == null) {
              ResourceLoader resourceLoader = new SimpleResourceLoader();
              aware(resourceLoader);
              ctx.setResourceLoader(resourceLoader);
          }
      } 
                              #location 6 
                              #vulnerability type THREAD_SAFETY_VIOLATION