nyc coverage report error on creation

[GDunne96]

Hi

I'm currently running nyc --reporter=lcov --reporter=text-lcov npm test to produce a coverage report. However, on the tests finishing and the creation of the coverage report the following error is given -

/node_modules/nyc/index.js:440
if (parentInfo.children.indexOf(info.uuid) === -1) {
^

TypeError: Cannot read property 'children' of undefined
at infos.forEach.info (/node_modules/nyc/index.js:440:22)
at Array.forEach ()
at NYC.writeProcessIndex (/node_modules/nyc/index.js:437:9)
at /node_modules/nyc/bin/nyc.js:68:9
at ChildProcess. (/node_modules/foreground-child/index.js:52:5)
at emitTwo (events.js:126:13)
at ChildProcess.emit (events.js:214:7)
at maybeClose (internal/child_process.js:915:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)

I've tried uninstalling and reinstalling nyc and tried other coverage reports e.g. clover etc but the problem still exists.

Thanks

[coreyfarrell]

This was reported at istanbuljs/nyc#1067. The fix has been merged to nyc but not yet released (will be released in nyc@14.1.0).

Without seeing your repo I can only assume that your npm test also runs nyc. My advice is to avoid recursively running nyc as this is largely untested. Assuming npm test runs tests under nyc I recommend rewriting your above command to npm test && nyc report --reporter=lcov --reporter-text-lcov.