Bug: throw exception :(

[A-gambit]

After simple run of exthouse recived an exception:

Error: Protocol error (Tracing.end): Tracing failed
    at Function.fromProtocolMessage (/Users/gregoryshehet/.nvm/versions/node/v12.14.1/lib/node_modules/exthouse/node_modules/lighthouse/lighthouse-core/lib/lh-error.js:132:19)
    at /Users/gregoryshehet/.nvm/versions/node/v12.14.1/lib/node_modules/exthouse/node_modules/lighthouse/lighthouse-core/gather/connections/connection.js:123:25
    at processTicksAndRejections (internal/process/task_queues.js:94:5) {
  protocolMethod: 'Tracing.end',
  protocolError: 'Tracing failed',
  friendlyMessage: undefined
}
Cannot destructure property `extFile` of 'undefined' or 'null'.

So I tried to fix it locally by wrapping extFile destructor inside if condition:

 if (completeRes[medianIndex]) {
      const { extFile } = completeRes[medianIndex]
      const medianFileName = join(tmpDir, `median-${extFile}`.replace(/-\d+(?=\.\w+$)/, ''))
      await remove(medianFileName)
      await symlink(extFile, medianFileName)
}

But got another error, and think to create an issue :)

ENOENT: no such file or directory, open '<SOME_PATH>/median-result-collamark.json'

So I created such a file manually. Some note, script creates another json file median-result-default.json with a new line symbol in the end '\n' of the file name.

After I received an error:

Error: Protocol error (Tracing.end): Tracing failed
    at Function.fromProtocolMessage (/Users/gregoryshehet/work/extension-perfomance/node_modules/lighthouse/lighthouse-core/lib/lh-error.js:132:19)
    at /Users/gregoryshehet/work/extension-perfomance/node_modules/lighthouse/lighthouse-core/gather/connections/connection.js:123:25
    at processTicksAndRejections (internal/process/task_queues.js:94:5) {
  protocolMethod: 'Tracing.end',
  protocolError: 'Tracing failed',
  friendlyMessage: undefined
}
Cannot read property 'main-thread-tasks' of undefined

It seems there is some bugs in the library.