webpack build error with node---UnhandledPromiseRejectionWarning

[CodeMagic6]

node-version: 7.6.0 and 8.9.0
platform: windows10

Recently when I use webpack command 'npm run build' It shows Bugs but It's OK few days ago.below it's the message.

(node:7948) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: original.line and original.column are not numbers -- you probably meant to omit the original mapping entirely and only map the generated position. If so, pass null for the original mapping instead of an object with empty or null values.
(node:7948) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[benjamingr]

Hey, sorry for the confusing message! I've actually raised an issue about better naming it yesterday and we'll make those errors clearer.

The actual error is:

Error: original.line and original.column are not numbers -- you probably meant to omit the original mapping entirely and only map the generated position. If so, pass null for the original mapping instead of an object with empty or null values.

This is a webpack error (and not a Node.js error) - specifically you're not passing the source maps options correctly or are using a plugin that isn't doing so. Feel free to open an issue in StackOverflow or in https://github.com/nodejs/help or in Webpack's official support channels.

This issue tracker is about suggestions for improvements or bugs in Node.js itself - this isn't one so I'm going to go ahead and close it.

If you're unsure who to approach about this issue please feel free to leave a comment and I'll try to work with you and get you more support from the webpack team or relevant plugin authors - although I warmly recommend StackOverflow from personal experience (if you create a mcve first it works best).

Thanks for raising the issue :)