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Re: Simultaneous notes yield "programming error"

From: David Kastrup
Subject: Re: Simultaneous notes yield "programming error"
Date: Fri, 02 Sep 2016 09:59:14 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

Simon Albrecht <address@hidden> writes:

> Hi Joel,
> thanks for the report.
> On the user list, I may have exaggerated my zeal for minimal
> examples. Here on the bug list, however, they are more strictly
> required, so the bass clef and bar checks (which I believe are
> certainly unrelated with the bug – can’t test on Linux) could’ve been
> left out.

There is some motivation for this: some of the harder problems need to
run the debugger in "recording" mode in order to be able to "step
backwards" from the occurence of a problem.  The recording mode runs
several orders of magnitude slower than normal runs, and if too much
code occurs between the reason of a problem and the error condition, it
will not be possible to "step backwards" to the place of the problem.

Now to be honest: for a problem of that kind the code sleuth is likely
to apply manual reduction/changes anyway in order to arrive at the
required minimalism, and that work is dwarved by the actually necessary
effort for debugging when you need to crank out the heavy-duty tools.

So while reports with several pages of code are rarely all that helpful,
a few lines are more often than not quite sufficient as a work example
even when there are still a few single elements that can be thrown out.

David Kastrup

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