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babel-generator arguments typeof null #9307

chlshown opened this Issue Jan 10, 2019 · 2 comments


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chlshown commented Jan 10, 2019

Bug Report

Current Behavior

Module build failed: TypeError: Cannot read property 'auxiliaryCommentBefore' of null

beble-generator/lib/index.js line:47 and line:76

for unknown reason, soametimes Generator arguments:opt can be 'null', so when the code is running in line 76 when we need read some options by using opts.auxiliaryCommentBefore,the exception is happend.Maybe we should add some judgement of the arguments 'opt' with the type 'null'?


  • babel-generator version(s): [6.26.1]
  • Node/npm version: [8.11.3/5.6.0]

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babel-bot commented Jan 10, 2019

Hey @chlshown! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
that typically always has someone willing to help. You can sign-up here
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nicolo-ribaudo commented Jan 10, 2019

Is the issue also present in Babel 7?

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