* wrong-number-of-arguments in post-command-hook
@ 2020-03-13 16:23 ndame
2020-03-16 15:23 ` Stefan Monnier
0 siblings, 1 reply; 4+ messages in thread
From: ndame @ 2020-03-13 16:23 UTC (permalink / raw)
To: emacs-devel@gnu.org
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I'm working on some code using post command hook and there were some errors
in it which were not trivial to find, because post-command-hook does not print
backtraces when debug on error is enabled.
It prints an error message though, here are two examples from my code:
Error in post-command-hook (my-post-command): (wrong-number-of-arguments (2 . 2) 1)
Error in post-command-hook (my-post-command): (wrong-type-argument listp t)
Seeing these I was wondering why the error does not contain the called function name.
Is that info not available? It could help debugging a lot if the error also printed the
function name alongside with the error.
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: wrong-number-of-arguments in post-command-hook
2020-03-13 16:23 wrong-number-of-arguments in post-command-hook ndame
@ 2020-03-16 15:23 ` Stefan Monnier
2020-03-17 5:59 ` ndame
0 siblings, 1 reply; 4+ messages in thread
From: Stefan Monnier @ 2020-03-16 15:23 UTC (permalink / raw)
To: ndame; +Cc: emacs-devel@gnu.org
> Error in post-command-hook (my-post-command): (wrong-type-argument listp t)
>
> Seeing these I was wondering why the error does not contain the called function name.
> Is that info not available?
More or less: it's in the stack somewhere, but it's not trivial to
extract that info reliably. The code that runs the hook does
store&print the name of the top-level function called
(`my-post-command` here) to try and help a bit.
> It could help debugging a lot if the error also printed the
> function name alongside with the error.
Have you tried `M-: (my-post-command) RET`?
Stefan
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-03-13 16:23 wrong-number-of-arguments in post-command-hook ndame
2020-03-16 15:23 ` Stefan Monnier
2020-03-17 5:59 ` ndame
2020-03-17 13:12 ` Stefan Monnier
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