* bug#9570: 24.0.50; "debug-on-entry: Definition of ... is not a list"
@ 2011-09-22 3:48 Drew Adams
2017-03-25 2:03 ` npostavs
0 siblings, 1 reply; 2+ messages in thread
From: Drew Adams @ 2011-09-22 3:48 UTC (permalink / raw)
To: 9570
emacs -Q
Load file fuzzy.el, available in the tar or zip here:
http://cx4a.org/software/auto-complete/#Downloads
(The file is small.)
M-x debug-on-entry isearch-message-prefix RET
raises this error:
debug-on-entry: Definition of isearch-message-prefix is not a list
The file is contains this advice:
(defadvice isearch-message-prefix (after fuzzy-isearch-message-prefix activate)
(if fuzzy-isearch
(setq ad-return-value (concat fuzzy-isearch-prefix ad-return-value))
ad-return-value))
I seem to vaguely recall some problem associated with lexbind, advice,
and the debugger (and perhaps byte-compiling?). But a search of the
Elisp manual and some bug reports turned up nothing. I thought that
such problems had already been ironed out, but perhaps not.
It's very hard to find the cause of such an error - even just locating
the code that leads to it is not easy. And it's not clear to me now
what a user can/should do about it. What's the deal? If there is
something that users must not do or must avoid, then please document it.
In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
of 2011-09-19 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.5) --no-opt'
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2011-09-22 3:48 bug#9570: 24.0.50; "debug-on-entry: Definition of ... is not a list" Drew Adams
2017-03-25 2:03 ` npostavs
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