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Re: problem with font lock

From: alin.s
Subject: Re: problem with font lock
Date: Fri, 15 Jan 2010 08:24:02 -0800 (PST)

begin by understanding which module tries to paint the region you expect.

There are many different  : overlays, font-lock based on classes of syntax,
font-lock based on regular expressions, etc.

You must have patience and discover which of these modules paints every
character/word from the buffer where you are interested.

Look into the elisp manual.

When you comment a line you should expect that the author of the minor/major
modes actives defined the fontification using the font lock for the
"comment" syntax class; its color is defined in font-lock-comment-face'. But
it is not sure that the commented line was fontified so.

Jose A. Ortega Ruiz-2 wrote:
> hi,
> i'm experiencing an intermittent problem with font lock that i don't
> know how to debug (this is emacs 23.1.91 packaged for debian). every now
> and then, font lock just stops working in most (but not all) of the
> buffers: the extant colors remain, but new text is not coloured at all
> (e.g., if i comment a line out, the line's text retains its initial
> faces instead of switching to the comment face). as i said, i haven't
> found a way to reproduce this behaviour deterministically, and when it
> starts happening i don't see any error message around. so my question
> is: what would you recommend to look at when i enter this state, so that
> i can submit a useful bug report?
> thanks!
> jao

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