webpack-blocks/* issue

[adamkeinan]

along my two last project i noticed an error that appears several times.
the error was "error Cannot read property 'match' of undefined".
i think this is a knew error that not necessarily related to npm or one of the packages,although it was specifically pointed to the affiliated-shrinkwrap.js and package-lock.json.
after investigating the problem i cloned the repo twice to an isolated test environment and managed to reproduce the error/'s.

1.there's a conflict of versions that creates a gap in the shrinkwrap.js after installing webpack-blocks.
2.even when using a shrinkwrap constantly the file becomes to corrupted.
3.in the case of webpack-blocks/babel its even worse. few libraries are just missing after install(tried several node version's).
this issue concerns only webpack v4 and

[andywer]

Thanks for reporting, Adam. Can you please share the stack trace with us?