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Regex RangeError for large sourcemaps

See original GitHub issue

Hi. We’re using webpack’s devtool: #cheap-module-inline-source-map option to add an inline base64 encoded source map to the bottom of our main app file. There’s a decent amount of code there, so the sourcemap is a pretty gigantic string.

We ended up seeing the following error in the console:

RangeError: Maximum call stack size exceeded
    at RegExp.exec (native)

Related to this regex:

var re = /(?:\/\/[@#][ \t]+sourceMappingURL=([^\s'"]+?)[ \t]*$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^\*]+?)[ \t]*(?:\*\/)[ \t]*$)/mg;

Changing one character in the regex fixes the issue (...[^\s'"]+?... to ...[^\s'"]*?...):

var re = /(?:\/\/[@#][ \t]+sourceMappingURL=([^\s'"]*?)[ \t]*$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^\*]+?)[ \t]*(?:\*\/)[ \t]*$)/mg;

I haven’t been able to figure out why that is yet though (e.g. I don’t think there’s any catastrophic backtracking going on in the original version?) 😕

Just wondering if anyone else can shed some light on this? Cheers. (PS this change also works for the version currently published to npm).

Issue Analytics

State:
Created 8 years ago
Comments:7

Top GitHub Comments

1reaction

LinusUcommented, Jul 31, 2019

This should be fixed in version 0.5.13, please report back if the issue persists!

1reaction

SkeLLLacommented, May 31, 2017

This issue is still present. Are there any plans for fixing this?

Here’s more detailed stacktrace, if it helps:

"RangeError: Maximum call stack size exceeded"
  "at RegExp.exec (<anonymous>)",
  "at RegExp.[Symbol.match] (native)",
  "at String.match (native)",
  "at urlParse (/myproject/node_modules/source-map-support/node_modules/source-map/lib/util.js:33:20)",
  "at normalize (/myproject/node_modules/source-map-support/node_modules/source-map/lib/util.js:82:13)",
  "at Object.join (/myproject/node_modules/source-map-support/node_modules/source-map/lib/util.js:174:7)",
  "at BasicSourceMapConsumer.SourceMapConsumer_originalPositionFor [as originalPositionFor] (/myproject/node_modules/source-map-support/node_modules/source-map/lib/source-map-consumer.js:621:27)",
  "at mapSourcePosition (/myproject/node_modules/source-map-support/source-map-support.js:195:42)"