* bug#17379: 24.3.90.1 pretest: (ag-get-arg 0) somehow returns nil in the middle of advice
@ 2014-05-01 2:58 Le Wang
2014-05-01 3:54 ` Stefan Monnier
0 siblings, 1 reply; 3+ messages in thread
From: Le Wang @ 2014-05-01 2:58 UTC (permalink / raw)
To: 17379
Ok the repro steps are very specific. I've tried to make a simpler
repro, but could not with the time I had.
The important 2 line of code is here:
https://github.com/lewang/flx/blob/test-bug-report/flx-ido.el#L226-227
The advice around it is very basic. The only interesting thing is
after
(setq test (ad-get-arg 0))
test is nil, but original-items is correct.
-----------------------------------------------------
Repro steps
1. clone git@github.com:lewang/flx.git
2. switch to branch "test-bug-report"
3. open "flx-ido.el"
4. follow installation instructions: in header
https://github.com/lewang/flx/blob/test-bug-report/flx-ido.el#L48-54
5. press "C-x b"
6. Look at "*Messages*" buffer.
The advice isn't complicated I have no idea what's going on there.
--
Le
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#17379: 24.3.90.1 pretest: (ag-get-arg 0) somehow returns nil in the middle of advice
2014-05-01 2:58 bug#17379: 24.3.90.1 pretest: (ag-get-arg 0) somehow returns nil in the middle of advice Le Wang
@ 2014-05-01 3:54 ` Stefan Monnier
2014-05-01 11:21 ` Le Wang
0 siblings, 1 reply; 3+ messages in thread
From: Stefan Monnier @ 2014-05-01 3:54 UTC (permalink / raw)
To: Le Wang; +Cc: 17379-done
tags 17379 wontfix
thanks
> Ok the repro steps are very specific. I've tried to make a simpler
> repro, but could not with the time I had.
> The important 2 line of code is here:
> https://github.com/lewang/flx/blob/test-bug-report/flx-ido.el#L226-227
> The advice around it is very basic. The only interesting thing is
> after (setq test (ad-get-arg 0))
> test is nil, but original-items is correct.
The arglist of ido-set-matches-1 is (items &optional do-full), so
(ad-get-arg 0) is `items', which you have rebound to nil.
AFAICT, this bug is very old. And, AFAICT, you can't fix it without
breaking backward compatibility. The new advice mechanism in 24.4
(i.e. advice-add) does not suffer from these problems, tho.
Stefan
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#17379: 24.3.90.1 pretest: (ag-get-arg 0) somehow returns nil in the middle of advice
2014-05-01 3:54 ` Stefan Monnier
@ 2014-05-01 11:21 ` Le Wang
0 siblings, 0 replies; 3+ messages in thread
From: Le Wang @ 2014-05-01 11:21 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 17379-done
On Wed, Apr 30, 2014 at 11:54 PM, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
> AFAICT, this bug is very old. And, AFAICT, you can't fix it without
> breaking backward compatibility. The new advice mechanism in 24.4
> (i.e. advice-add) does not suffer from these problems, tho.
Ahh. I completely missed that items binding. It makes sense now.
Thanks!
--
Le
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-05-01 2:58 bug#17379: 24.3.90.1 pretest: (ag-get-arg 0) somehow returns nil in the middle of advice Le Wang
2014-05-01 3:54 ` Stefan Monnier
2014-05-01 11:21 ` Le Wang
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