[int_19h]

Or how about this for error reporting:

https://github.com/npm/npm/issues/9633

I especially like the part where it says "This is most likely not a problem with npm itself", even though it clearly is a problem with npm itself (as evidenced by non-deterministic nature of the bug).

[abritinthebay]

That message is their generic message because ANY error ended up being reported in github as an issue with NPM.

Again, bad dev practice.