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Re: How can I debug a problem triggered from jit-lock's background fonti
From: |
Daniel Colascione |
Subject: |
Re: How can I debug a problem triggered from jit-lock's background fontification? |
Date: |
Tue, 08 Mar 2011 00:02:57 -0800 |
User-agent: |
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 |
On 2/7/11 2:22 PM, Lennart Borgman wrote:
> On Mon, Feb 7, 2011 at 11:19 PM, Alan Mackenzie <address@hidden> wrote:
>>
>> I've actually inserted a call to `ignore' into the critical place, with
>> all the things I want to see as parameters to ignore. Then I trace
>> `ignore'. I _think_ I've got the problem tied down, but that will have
>> to wait till tomorrow.
>
> Thanks for that trick, I never thought about using ignore like that.
>
That is a neat trick. One thing I like to do is use something like this
as my "debug probe":
(progn
(message "foo: %s" foo)
(redisplay t)
(sit-for 1)
t ; or nil, as appropriate
)
This way, I can visualize the progress a function is making as it
travels up and the down the buffer and detect patterns more easily than
I can by looking at numeric output. If I have debug-on-quit turned on,
I can stop the process when I notice something amiss and figure out what
went wrong.
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