Re: enter debugger on failure

[Ludovic Courtès]

Hi!

Ricardo Wurmus <address@hidden> skribis:

> sometimes Guix crashes.  That’s sometimes because of existing bugs
> (often in importers) or because I’ve just added something that doesn’t
> quite work.
>
> When Guix crashes it prints a backtrace and exits.  Would it be possible
> to change that behaviour and instead enter a debug REPL where I could
> inspect values and resume after correcting the error?

‘guix system’ has a ‘--on-error’ command-line option that we could
perhaps generalize somewhat.  WDYT?

Now, two comments:

  1. importers are “for developers”, so I’m personally more tolerant if
     they’re rough on the edges ;-)

  2. one can always do:

       ./pre-inst-env guile
       address@hidden> ,use(guix scripts import)
       address@hidden> (guix-import "foo" "bar")
       ;; crash!
       address@hidden>[1] ,bt

Ludo’.