From: Alex <agrambot@gmail.com>
To: emacs-devel@gnu.org
Subject: Accuracy of procedure name in error messages
Date: Mon, 09 Oct 2017 12:30:48 -0600 [thread overview]
Message-ID: <87wp44b2cn.fsf@gmail.com> (raw)
For what brought up this question, see:
https://lists.gnu.org/archive/html/bug-gnu-emacs/2017-10/msg00261.html
The procedure that's named in error messages seems to be incorrect in
some cases, especially in bytecode.
For example, evaluate:
(defun outer ()
(inner))
(defun inner ()
(setq global (1+ nil)))
With eval-expression-debug-on-error non-nil, evaluate (outer). The
debugger pops up with "1+(nil)" at the top, but the error message
displayed after continuing is:
setq: Wrong type argument: number-or-marker-p, nil
Shouldn't it say "1+: Wrong type..."?
Now if you byte-compile `outer' and `inner' and evaluate (outer), then
the debugger pops up with "inner()" at the top. The error message
displayed after continuing is:
outer: Wrong type argument: number-or-marker-p, nil
So it seems that the error message is created one frame off, and the
bytecode versions ignore primitives like `setq' and `1+'.
Is this a known limitation, and/or should I file a bug report?
reply other threads:[~2017-10-09 18:30 UTC|newest]
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