jit-lock still throws errors: font-lock-reference-face

jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

Have updated multiple times from git, done a make bootstrap etc all to
no avail,
once in a while emacs throws  an error, but produces no backtrace even
if you toggle debug-on-error:

Error during redisplay: (jit-lock-function 9364) signaled (void-variable font-lock-reference-face)
-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

--

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

Re: jit-lock still throws errors: font-lock-reference-face

[Lars Ingebrigtsen]

"T.V Raman" <raman@google.com> writes:

> Have updated multiple times from git, done a make bootstrap etc all to
> no avail,
> once in a while emacs throws  an error, but produces no backtrace even
> if you toggle debug-on-error:
>
> Error during redisplay: (jit-lock-function 9364) signaled
> (void-variable font-lock-reference-face)

Are you sure you're really up-to-date?  I think this problem was fixed a
day or two ago.

Re: jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

will continue trying --- I thought the real fix was from Stefan which
was before the weekend. -- the fix in semantic I think Lars Ingebrigtsen writes:
 > "T.V Raman" <raman@google.com> writes:
 > 
 > > Have updated multiple times from git, done a make bootstrap etc all to
 > > no avail,
 > > once in a while emacs throws  an error, but produces no backtrace even
 > > if you toggle debug-on-error:
 > >
 > > Error during redisplay: (jit-lock-function 9364) signaled
 > > (void-variable font-lock-reference-face)
 > 
 > Are you sure you're really up-to-date?  I think this problem was fixed a
 > day or two ago.

-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

--

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

Re: jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

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[-- Attachment #1: Type: text/plain; charset=gb18030, Size: 665 bytes --]

Lars, 

I think I found the problem: there are references to
font-lock-reference-face in external packages!

In my case, here is one that I use a lot: folding-mode.el

grep there says:
We really need some kind of backward compatible alias --- am sure
folding isn't the only external package that references that
reference-face


grep font-lock-reference *.el
folding.el:(defcustom folding-font-lock-begin-mark 'font-lock-reference-face
folding.el:(defcustom folding-font-lock-end-mark 'font-lock-reference-face
09:54:45 folding-20220110.1718 $ 
-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
7©4 Id: kg:/m/0285kf1  •0Ü8

Re: jit-lock still throws errors: font-lock-reference-face

[Alan Mackenzie]

Hello, Raman

On Mon, Sep 19, 2022 at 09:38:59 -0700, T.V Raman wrote:
> Have updated multiple times from git, done a make bootstrap etc all to
> no avail,
> once in a while emacs throws  an error, but produces no backtrace even
> if you toggle debug-on-error:

Try M-: (setq backtrace-on-redisplay-error t), which was designed for
just this sort of thing.  When a redisplay error occurs, a buffer
*Redisplay-trace* containing a backtrace will be created.  You just need
to display that buffer in a window somewhere.

> Error during redisplay: (jit-lock-function 9364) signaled (void-variable font-lock-reference-face)
> -- 

> Thanks,

> --Raman(I Search, I Find, I Misplace, I Research)
> ♉ Id: kg:/m/0285kf1  🦮

> --

> Thanks,

> --Raman(I Search, I Find, I Misplace, I Research)
> ♉ Id: kg:/m/0285kf1  🦮

-- 
Alan Mackenzie (Nuremberg, Germany).

Re: jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

thx for that tip but I found the problem already, see other
note. Basically there are *many* external packages that refer to that
face.
Alan Mackenzie writes:
 > Hello, Raman
 > 
 > On Mon, Sep 19, 2022 at 09:38:59 -0700, T.V Raman wrote:
 > > Have updated multiple times from git, done a make bootstrap etc all to
 > > no avail,
 > > once in a while emacs throws  an error, but produces no backtrace even
 > > if you toggle debug-on-error:
 > 
 > Try M-: (setq backtrace-on-redisplay-error t), which was designed for
 > just this sort of thing.  When a redisplay error occurs, a buffer
 > *Redisplay-trace* containing a backtrace will be created.  You just need
 > to display that buffer in a window somewhere.
 > 
 > > Error during redisplay: (jit-lock-function 9364) signaled (void-variable font-lock-reference-face)
 > > -- 
 > 
 > > Thanks,
 > 
 > > --Raman(I Search, I Find, I Misplace, I Research)
 > > ♉ Id: kg:/m/0285kf1  🦮
 > 
 > > --
 > 
 > > Thanks,
 > 
 > > --Raman(I Search, I Find, I Misplace, I Research)
 > > ♉ Id: kg:/m/0285kf1  🦮
 > 
 > -- 
 > Alan Mackenzie (Nuremberg, Germany).

-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

--

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

Re: jit-lock still throws errors: font-lock-reference-face

[Lars Ingebrigtsen]

"T.V Raman" <raman@google.com> writes:

> I think I found the problem: there are references to
> font-lock-reference-face in external packages!
>
> In my case, here is one that I use a lot: folding-mode.el

This variable has been obsolete for almost a decade, and was finally
removed recently.  So you just have to get that fixed in the
folding-mode.el library.

Re: jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

but it's not just folding-mode -- it's  there in a lot of large
external packages -- e.g. auctex.

I think we're doing our users and developers a disservice by this type
of cosmetic yet breaking change.

For now I've done something even worse with respect to covering up the
problem, namely creating a defvar that stops the error. But this is
not good for emacs' long-term health,  

Lars Ingebrigtsen writes:
 > "T.V Raman" <raman@google.com> writes:
 > 
 > > I think I found the problem: there are references to
 > > font-lock-reference-face in external packages!
 > >
 > > In my case, here is one that I use a lot: folding-mode.el
 > 
 > This variable has been obsolete for almost a decade, and was finally
 > removed recently.  So you just have to get that fixed in the
 > folding-mode.el library.

-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

--

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

Re: jit-lock still throws errors: font-lock-reference-face

[Lars Ingebrigtsen]

"T.V Raman" <raman@google.com> writes:

> but it's not just folding-mode -- it's  there in a lot of large
> external packages -- e.g. auctex.

I downloaded the latest auctex, and I could see no reference to the
`font-lock-reference-face' variable there.  (It does reference the
`font-lock-reference-face' face, but that's as it should be.)

Re: jit-lock still throws errors: font-lock-reference-face

[chad]

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I suspect you're being mislead by grep not grokking the difference
between a face and a variable?

~Chad

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Re: jit-lock still throws errors: font-lock-reference-face

[T.V Raman]

possible,  but I've moved beyond this by just defining that var, it's
not worth arguing. 

If we're  going to break packages, we're going to break packages 
chad writes:
 > I suspect you're being mislead by grep not grokking the difference
 > between a face and a variable?
 > 
 > ~Chad

-- 

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮

--

Thanks,

--Raman(I Search, I Find, I Misplace, I Research)
♉ Id: kg:/m/0285kf1  🦮