Show segfaults

[AlexDaniel]

For example, see this: https://gist.github.com/Whateverable/9f52f2a53e11a4d9519e5cf203e3b714

It segfaults in the end, but it is not displayed.

[MasterDuke17]

Implemented in e0be906 and 6341f1924322de53e317dc1113dbb4fa291b481f.

[AlexDaniel]

There are tests for bisectable, evalable and committable. Should we add tests for other bots too?

[AlexDaniel]

Ignore this comment, I'm testing github markup:

for 1…∞ {
    say 42
}