CI is failing on CPAN installs

[veripoolbot]

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Author Name: Todd Strader (@toddstrader)
Original Redmine Issue: 1508 from https://www.veripool.org

Original Assignee: Todd Strader (@toddstrader)

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Travis jobs are failing while installing CPAN modules:

The command "yes yes | sudo cpan -fi Unix::Processors Parallel::Forker Bit::Vector" failed and exited with 8 during .

I'm restarting a few jobs to see how stable the failures are:
https://travis-ci.com/verilator/verilator/builds/127979612
https://travis-ci.com/verilator/verilator/builds/127932280

If it's stable, I'll fix it. If not I may have to add some debug to track it.

[veripoolbot]

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Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2019-09-17T13:28:20Z

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Note CPAN listed Parallel::Forker but it didn't seem to find it in Travis. This morning I tried pushing a new Parallel::Forker release just to see if that would help, didn't look if it did or not yet.

[veripoolbot]

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Original Redmine Comment
Author Name: Todd Strader (@toddstrader)
Original Date: 2019-09-17T14:53:17Z

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OK, great. I didn't look closely enough at the log before, but now I see:

Warning: Cannot install Parallel::Forker, don't know what it is.
Try the command
     i /Parallel::Forker/
to find objects with matching identifiers.

The jobs are passing now so either that fixed it or it was some other transient CPAN issue. But since the error message (albeit in the middle of the log) does tell us what to do, I think we're good here.