bug#19432: backtrace for errors that occur inside process sentinels

[Lars Ingebrigtsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Please provide a way to get backtraces for errors that occur inside
>> process sentinels.
>
> (setq debug-on-error t) works for me:
>
>    emacs -Q --eval '(setq debug-on-error t)'                          \
>             --eval '(let ((proc (start-process "foo" nil "true")))    \
>                       (set-process-sentinel proc (lambda (&rest args) \
>                                                    (+ args 2))))'
>
> brings up a *Backtrace* buffer just fine.

So this doesn't seem reproducible.  Jonas, do you have a recipe how to
trigger this bug?

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