CC mode 5.33 does not work on Emacs 24.5.1 for Mac

CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Juha Nieminen]

I was wondering if somebody could help me figuring out what the problem is
with this.

I'm using the following version of Emacs on this Mac OS X computer:

GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
 of 2015-04-10 on builder10-9.porkrind.org

I downloaded CC Mode 5.33 from http://cc-mode.sourceforge.net/ and
followed the installation instructions.

After adding the directory to the load path, the new CC mode 5.33 is
loaded when I open a source code file ("M-x c-version" gives "Using CC
Mode version 5.33"). However, it does not work properly.

Immediately upon opening a source code file, it gives the error "File
mode specification error: (wrong-type-argument stringp nil)". The text
itself is also only partially colored (eg. some comment lines are
colored while others aren't). Trying to autoindent by pressing tab
gives the error "Wrong type argument: stringp, nil".

Note that:

* My .emacs is not the culprit, as the problem happens even if said file
contains nothing more than the path-setting line

(add-to-list 'load-path "~/software/cc-mode-5.33/")

* The problem happens even if I launch emacs with the options
"-Q -L ~/software/cc-mode-5.33" or the option "--no-site-file".

* The problem does *not* happen if I run an older emacs (22.1.1)
pre-installed in this system (which, however, seems to be text
mode only, with no GUI support).

* The problem does *not* happen with a Windows port of emacs.
It only happens with this Mac OS X version.

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Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Juha Nieminen]

Juha Nieminen <nospam@thanks.invalid> wrote:
> I was wondering if somebody could help me figuring out what the problem is
> with this.

So nobody has any suggestions whatsoever?

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Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[John Mastro]

On Mon, Sep 19, 2016 at 11:04 PM, Juha Nieminen <nospam@thanks.invalid> wrote:
> Juha Nieminen <nospam@thanks.invalid> wrote:
>> I was wondering if somebody could help me figuring out what the problem is
>> with this.
>
> So nobody has any suggestions whatsoever?

I suggest you report this as a bug with M-x report-emacs-bug. The
maintainers of both Emacs and CC-mode monitor reports there.

Other than that, invoke M-x toggle-debug-on-error and then repeat the
recipe so you get a backtrace. That will show what chain of calls lead
to the error (and would be a good thing to include in the bug report, if
you file one).

        John

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Juha Nieminen]

John Mastro <john.b.mastro@gmail.com> wrote:
> On Mon, Sep 19, 2016 at 11:04 PM, Juha Nieminen <nospam@thanks.invalid> wrote:
>> Juha Nieminen <nospam@thanks.invalid> wrote:
>>> I was wondering if somebody could help me figuring out what the problem is
>>> with this.
>>
>> So nobody has any suggestions whatsoever?
> 
> I suggest you report this as a bug with M-x report-emacs-bug. The
> maintainers of both Emacs and CC-mode monitor reports there.

I did that. They have no idea.

> Other than that, invoke M-x toggle-debug-on-error and then repeat the
> recipe so you get a backtrace. That will show what chain of calls lead
> to the error (and would be a good thing to include in the bug report, if
> you file one).

I also did that. And they still didn't have any idea.

For what it's worth, here's the output:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  signal(wrong-type-argument (stringp nil))
  byte-code("\210\302	     @	      A\"\207" [start err signal] 3)
  c-syntactic-re-search-forward(nil nil t t)
  c-forward-<>-arglist-recur(nil)
  byte-code("\302\211\207" [all-types c-record-found-types c-forward-<>-arglist-recur] 2)
  c-forward-<>-arglist(nil)
  c-restore-<>-properties(1 1164 1163)
  #[(fn) "ddeZ#\207" [fn] 5](c-restore-<>-properties)
  mapc(#[(fn) "ddeZ#\207" [fn] 5] (c-depropertize-new-text c-extend-font-lock-region-for-macros c-before-after-change-digit-quote c-after-change-re-mark-raw-strings c-neutralize-syntax-in-and-mark-CPP c-restore-<>-properties c-change-expand-fl-region))
  c-common-init(c++-mode)
  c++-mode()
  set-auto-mode-0(c++-mode nil)
  set-auto-mode()
  normal-mode(t)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer test.cc> "~/tmp/test.cc" nil nil "~/tmp/test.cc" (14346868 16777217))
  find-file-noselect("~/tmp/test.cc" nil nil t)
  find-file("~/tmp/test.cc" t)
  call-interactively(find-file nil nil)
  command-execute(find-file)

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Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[John Mastro]

Juha Nieminen <nospam@thanks.invalid> wrote:
>> I suggest you report this as a bug with M-x report-emacs-bug. The
>> maintainers of both Emacs and CC-mode monitor reports there.
>
> I did that. They have no idea.
>
>> Other than that, invoke M-x toggle-debug-on-error and then repeat the
>> recipe so you get a backtrace. That will show what chain of calls lead
>> to the error (and would be a good thing to include in the bug report, if
>> you file one).
>
> I also did that. And they still didn't have any idea.

What was the bug number? I wanted to see if I could find any hints but
couldn't find the email by searching for your name.

> For what it's worth, here's the output:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   signal(wrong-type-argument (stringp nil))
>   byte-code("\210\302        @        A\"\207" [start err signal] 3)
>   c-syntactic-re-search-forward(nil nil t t)
>   c-forward-<>-arglist-recur(nil)

After the error occurs, what's the value of `c-<>-notable-chars-re' in
that buffer?

        John

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Juha Nieminen]

John Mastro <john.b.mastro@gmail.com> wrote:
>> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>>   signal(wrong-type-argument (stringp nil))
>>   byte-code("\210\302        @        A\"\207" [start err signal] 3)
>>   c-syntactic-re-search-forward(nil nil t t)
>>   c-forward-<>-arglist-recur(nil)
> 
> After the error occurs, what's the value of `c-<>-notable-chars-re' in
> that buffer?

I don't know how to find that out.

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Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Óscar Fuentes]

Juha Nieminen <nospam@thanks.invalid> writes:

>> After the error occurs, what's the value of `c-<>-notable-chars-re' in
>> that buffer?
>
> I don't know how to find that out.

While on the buffer of interest:

  M-h v c-<>-notable-chars-re [ENTER]

A window will popup containing something like this at the top:

  c-<>-notable-chars-re is a variable defined in ‘cc-engine.el’.
  Its value is "[<;{},>()]"
  Local in buffer fun.cpp; global value is nil

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[John Mastro]

 Óscar Fuentes <ofv@wanadoo.es> wrote:
>   M-h v c-<>-notable-chars-re [ENTER]
    ^^^

That should be C-h :)

        John

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[Óscar Fuentes]

John Mastro <john.b.mastro@gmail.com> writes:

>  Óscar Fuentes <ofv@wanadoo.es> wrote:
>>   M-h v c-<>-notable-chars-re [ENTER]
>     ^^^
>
> That should be C-h :)

Of course. Thanks for the correction and my apologies to the OP.

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[B. T. Raven]

On 10/12/2016 02:28, Juha Nieminen wrote:
> John Mastro <john.b.mastro@gmail.com> wrote:
>>> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>>>   signal(wrong-type-argument (stringp nil))
>>>   byte-code("\210\302        @        A\"\207" [start err signal] 3)
>>>   c-syntactic-re-search-forward(nil nil t t)
>>>   c-forward-<>-arglist-recur(nil)
>>
>> After the error occurs, what's the value of `c-<>-notable-chars-re' in
>> that buffer?
>
> I don't know how to find that out.
>
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>

According to this diffs page

https://lists.gnu.org/archive/html/emacs-diffs/2016-02/msg00438.html


c-<>-notable-chars-re
is a new variable in ver. 25 so it won't be found in ver. 24

Re: CC mode 5.33 does not work on Emacs 24.5.1 for Mac

[John Mastro]

B. T. Raven <btraven@nihilo.net> wrote:
> On 10/12/2016 02:28, Juha Nieminen wrote:
>>
>> John Mastro <john.b.mastro@gmail.com> wrote:
>>>>
>>>> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>>>>   signal(wrong-type-argument (stringp nil))
>>>>   byte-code("\210\302        @        A\"\207" [start err signal] 3)
>>>>   c-syntactic-re-search-forward(nil nil t t)
>>>>   c-forward-<>-arglist-recur(nil)
>>>
>>>
>>> After the error occurs, what's the value of `c-<>-notable-chars-re' in
>>> that buffer?
>>
>>
>> I don't know how to find that out.
>>
>> --- news://freenews.netfront.net/ - complaints: news@netfront.net ---
>>
>
> According to this diffs page
>
> https://lists.gnu.org/archive/html/emacs-diffs/2016-02/msg00438.html
>
>
> c-<>-notable-chars-re
> is a new variable in ver. 25 so it won't be found in ver. 24

Juha is using standalone CC Mode 5.33, so I believe it should be there.

        John