I got error on webpack-div-middleware

TypeError: Cannot read property 'filename' of undefined
      at /Users/nico/node/react-koa2-server/node_modules/koa-react-view/index.js:152:36
      at Array.forEach (native)
      at cleanCache (/Users/nico/node/react-koa2-server/node_modules/koa-react-view/index.js:151:30)
      at Object.app.context.render (/Users/nico/node/react-koa2-server/node_modules/koa-react-view/index.js:85:9)
      at home.js:32:21
      at /Users/nico/node/react-koa2-server/node_modules/react-router/lib/match.js:65:5
      at /Users/nico/node/react-koa2-server/node_modules/react-router/lib/createTransitionManager.js:118:11
      at done (/Users/nico/node/react-koa2-server/node_modules/react-router/lib/AsyncUtils.js:79:19)
      at /Users/nico/node/react-koa2-server/node_modules/react-router/lib/AsyncUtils.js:85:7
      at getComponentsForRoute (/Users/nico/node/react-koa2-server/node_modules/react-router/lib/getComponents.js:15:5)
      at /Users/nico/node/react-koa2-server/node_modules/react-router/lib/getComponents.js:41:5
      at /Users/nico/node/react-koa2-server/node_modules/react-router/lib/AsyncUtils.js:84:5
      at Array.forEach (native)
      at mapAsync (/Users/nico/node/react-koa2-server/node_modules/react-router/lib/AsyncUtils.js:83:9)
      at getComponents (/Users/nico/node/react-koa2-server/node_modules/react-router/lib/getComponents.js:40:28)
      at finishEnterHooks (/Users/nico/node/react-koa2-server/node_modules/react-router/lib/createTransitionManager.js:112:35)

And I found the error in the code

function cleanCache(match) {
  Object.keys(require.cache).forEach(function(module) {
    if (match(require.cache[module].filename)) {
      delete require.cache[module];
    }
  });
}

It should be

function cleanCache(match) {
  Object.keys(require.cache).forEach(function(module) {
    if (require.cache[module] && require.cache[module].filename && match(require.cache[module].filename)) {
      delete require.cache[module];
    }
  });
}

Locate the cleanCache function in the koa-react-view source and inspect how entries in require.cache are handled during rendering. Reproduce the reported error through the render path in the issue, then verify that entries without a filename no longer cause the failure.