Crash on node v25

c8 tape 'test/**/*.js'
file:///Users/coderaiser/@cloudcmd/fileop/node_modules/yargs/yargs:3
const {applyExtends, cjsPlatformShim, Parser, Yargs, processArgv} = require('./build/index.cjs')
                                                                    ^

ReferenceError: require is not defined in ES module scope, you can use import instead
    at file:///Users/coderaiser/@cloudcmd/fileop/node_modules/yargs/yargs:3:69
    at ModuleJobSync.runSync (node:internal/modules/esm/module_job:534:37)

Fix: #581
Related to yargs/yargs#2509
Possible solution:

Possible solution: superc8 with:

✅ Fixed TODO (parase-args#L176, check-coverage#L14);
✅ ESM-only code;
✅ Updated dependencies, including yargs that works in node v25 and node v26;
✅ Applied 🐊Putout default suggestions;
✅ When tests failed do not report coverage;
✅ Used execa instead of foreground-child;

The easiest way out of it is to update dependencies. Specifically go from yargs 17 to 18 — the major version has changed.

Can confirm this has broken a lot of builds. Basically anything that uses node@latest in CI with c8 (which at least shows using latest node did the intended job of catching these things 😄 ).

Work around bcoe/c8#582

Update dependencies, work around

update dependencies (#145)

build(npm): updates external dependencies

@uhop

As a workaround I've temporarily added an override to our local package.json like so:

  "overrides": {
    "c8": {
      "yargs": "^18.0.0"
    },
  },

... and can confirm that, as @uhop mentions bumping yargs to 18 seems resolve the issue without code changes in c8 (build before override, build after override).

Edit: Was looking to make a PR to bump yargs in c8 itself, but bcoe already has one cooking: #578. So the 'fix' mentioned in this comment is only for the really impatient :-)

Patch c8 under Node.js 25

Downgrade c8

Possible solution: superc8 with:

✅ Fixed TODO (parase-args#L176, check-coverage#L14);
✅ ESM-only code;
✅ Updated dependencies, including yargs that works on node v25 and node v26;
✅ Applied 🐊Putout default suggestions;
✅ When tests failed do not report coverage;
✅ Used execa instead of foreground-child;

Patch c8 under Node.js 25

Engine, dependency and release updates

Merge pull request #957 from ain/dependabot/npm_and_yarn/c8-11.0.0

Temp revert "Update c8 to 11.0.0"

Don't use c8 for latest Node.js in CI

chore: override yargs version to fix c8 crash

override yargs version

Not working on Node v26 either

@bcoe

@bcoe do you want any help with this? can open a PR if its of help. would be good to fix this

Temporarily work around yargs incompatibility with Node 26

@coderaiser

I think this is fixed now in v12. @coderaiser can you verify and close this issue if it is fixed?

fix(ci): drop Node 26 from CI matrix due to c8/yargs incompatibility

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Crash on node v25 #582

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Crash on node v25 #582

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uhop commented on Feb 25, 2026

43081j commented on Feb 26, 2026

sverweij commented on Feb 26, 2026

coderaiser commented on Feb 27, 2026

YasharF commented on May 5, 2026

43081j commented on May 13, 2026

YasharF commented on Jul 22, 2026

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