From: Helmut Eller <eller.helmut@gmail.com>
To: 9463@debbugs.gnu.org
Subject: bug#9463: 24.0.50; Errors should not be continuable
Date: Fri, 09 Sep 2011 08:53:02 +0200 [thread overview]
Message-ID: <m2fwk6dx69.fsf@gmail.com> (raw)
In-Reply-To: <m2sjo71bvo.fsf@gmail.com>
* Stefan Monnier [2011-09-09 02:23] writes:
>>>> emacs -Q -eval '(let ((debug-on-error t)) (error "foo"))'
>>>> enters the debugger. Pressing c somehow manages to continue. That make
>>>> no sense to me. The debugger should instead not continue and say
>>>> that errors are not continuable.
>>>
>>> "c" in errors now "continues" in the sense of "do what would have
>>> happened if the debugger had not been called". I.e. it will actually
>>> signal the error which can then be caught by condition-cases further up
>>> the stack, .... I.e. it's very similar to what happens with "q", but is
>>> often cleaner.
>> I think the "do what would have happened if the debugger had not been
>> called" thing should be a different command, like resignal or abort.
>
> Why?
1. Why not?
> When the debugger is called in a non-error case, the "c" does just
> that "do whatever would have happened if the debug call had no taken place".
2. it's an incompatible change
3. it's frustrating when people introduce DWIM-ish features when my
expectations are completely different
>
>> c should only continue from truly continuable situations, like
>> breakpoints.
>
> Again: why?
4. it's easy to accidentally press c when using d and c multiple times
5. I have already lost valuable information (and time) because of this
too eager stack unwinding.
6. there is nothing wrong with the traditional distinction between
continuable and non-continuable situations
>
>
> Stefan
>
> PS: The change you seem to dislike is a bug-fix in my opinion, and it has
> fixed a few real problems
It introduced a new bug: r can now be used in every situation.
> (e.g. when you enter the debugger from within
> a minibuffer, you can now continue your minibuffer operation, whereas
> earlier you could only abort back to the top-level).
You could do that just as well with a separate resignal command.
Helmut
next prev parent reply other threads:[~2011-09-09 6:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-08 12:01 bug#9463: 24.0.50; Errors should not be continuable Helmut Eller
2011-09-08 13:31 ` Stefan Monnier
2011-09-08 18:13 ` Helmut Eller
2011-09-09 2:23 ` Stefan Monnier
2011-09-09 6:53 ` Helmut Eller [this message]
2011-09-09 14:07 ` Stefan Monnier
2011-09-09 16:37 ` Helmut Eller
2011-09-09 21:44 ` Stefan Monnier
2011-09-10 18:27 ` Helmut Eller
2011-09-19 21:17 ` Stefan Monnier
2011-09-20 6:49 ` Helmut Eller
2011-09-20 21:53 ` Stefan Monnier
2011-09-21 8:05 ` Helmut Eller
2011-09-21 19:09 ` Stefan Monnier
2011-09-21 19:53 ` Helmut Eller
2012-02-22 2:20 ` Glenn Morris
2011-09-09 7:10 ` Eli Zaretskii
2011-09-09 7:36 ` Helmut Eller
2011-09-09 7:59 ` Eli Zaretskii
2011-09-09 8:22 ` Helmut Eller
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