allow Coverage to start when Coverage.running? is not implemented

[notEthan]

Amends https://github.com/simplecov-ruby/simplecov/pull/1035/commits/1cc7650454fc7c53e7a724941662c3e9d3329ccc from #1035

Another option would be to just call Coverage.start unconditionally and rescue the RuntimeError it now raises when already started.

[eregon]

FYI I'm planning to try adding TruffleRuby in CI to catch such issues faster, but that needs more work so I would suggest merging this first.

[eregon]

Confirmed this PR reduces bundle exec rake spec from 9 to just 1 failure on truffleruby-dev.

[notEthan]

I also started looking yesterday at adding truffle to the CI here, but got hung up on aruba/childprocess, then saw that you were ahead of me and had opened an issue about the same already.

[eregon]

@PragTob @colszowka Hello, it would be great if this can be merged and released when you have some open-source time, because the latest release breaks a bunch of CIs testing TruffleRuby (e.g. see backlinks to this PR and #1044)

[notEthan]

Yes, it would be quite helpful if this fix could make it into a release.

[eregon]

Ping, please merge and release this. It's been one month and a half and it still breaks the CI of e.g. https://github.com/ronin-rb/ronin/actions/runs/4089986844/jobs/7053088486 Can I do anything to help with this?

[AlexWayfer]

I've been stuck with this:

• https://github.com/filewatcher/filewatcher-matrix/pull/47
• https://github.com/filewatcher/filewatcher-cli/pull/93

[PragTob]

Thanks for this, sorry for all the silence. Life and more happend, been a tough year+. I'll merge, it should be fine famous simplecov maintainer last words

Thanks y'all for your work :green_heart:

@notEthan : Very cute bunny avatar!

[notEthan]

Thanks for merging. A release with this would make it usable.

[eregon]

@notEthan If the issue is SimpleCov 0.21.2 + TruffleRuby, that's solved in recent TruffleRuby releases and since https://github.com/simplecov-ruby/simplecov/issues/1044#issuecomment-1529783628, because TruffleRuby has Coverage.running? since then.