Describe the issue / bug.

No hash value causes the cache problem

How can I reproduce this problem?

assets/image/a/1.png
assets/image/b/1.png
when you use both at the same time, a/1.png will be replaced by b/1.png because their names are the same

bugfix

      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        use: {
          loader: 'url-loader',
          query: {
            limit: 10000,
            name: 'imgs/[name].[hash:7].[ext]'
          }
        }
      },