bug#19887: 24.4; Cannot kill buffer; Wrong type argument: overlayp, nil

bug#19887: 24.4; Cannot kill buffer; Wrong type argument: overlayp, nil

[Damian Nadales]

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Hello,

Running Emacs 24.4, compiled from source I found I cannot kill a buffer when performing these steps:

-          Run emacs -Q

-          Create an org-mode file (i.e. ``myorgfile.org``)

-          Insert the following text:

o   #+BEGIN_SRC C++

#+END_SRC

-          Edit the source block by placing the cursor inside the SRC block.

-          Start C++ mode (c++-mode)

-          Try to kill the buffer.

If you need further information please do not hesitate in contacting me.

Best regards,
Damian.
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bug#19887: 24.4; Cannot kill buffer; Wrong type argument: overlayp, nil

[Glenn Morris]

Damian Nadales wrote:


> -          Run emacs -Q
>
> -          Create an org-mode file (i.e. ``myorgfile.org``)
>
> -          Insert the following text:
>
> o   #+BEGIN_SRC C++
>
> #+END_SRC
>
> -          Edit the source block by placing the cursor inside the SRC block.
>
> -          Start C++ mode (c++-mode)
>
> -          Try to kill the buffer.

Please do

M-x toggle-debug-on-error

repeat the problem, and post the resulting backtrace.
(I can't reproduce it.)

bug#19887: 24.4; Cannot kill buffer; Wrong type argument: overlayp, nil

[Alexis]

On 2015-02-18T06:25:57+1100, Glenn Morris said:

 GM> Damian Nadales wrote:

 >> - Run emacs -Q
 >> 
 >> - Create an org-mode file (i.e. ``myorgfile.org``)
 >> 
 >> - Insert the following text:
 >> 
 >> o #+BEGIN_SRC C++
 >> 
 >> #+END_SRC
 >> 
 >> - Edit the source block by placing the cursor inside the SRC 
 >> block.
 >> 
 >> - Start C++ mode (c++-mode)
 >> 
 >> - Try to kill the buffer.

 GM> Please do

 GM> M-x toggle-debug-on-error

 GM> repeat the problem, and post the resulting backtrace.  (I 
 can't GM> reproduce it.)

Running a manually compiled Emacs 24.4.1 on Debian 
Wheezy(+updates) x86_64, and following the above steps, i can't 
reproduce this either.

From the above description, i assume by the "Start C++ mode" line, 
you're not moving the cursor inside the source block and then 
doing:

    C-c '

(i.e. `org-edit-special`) in order to open a c++-mode buffer for 
editing the block contents?


Alexis.

bug#19887: 24.4; Cannot kill buffer; Wrong type argument: overlayp, nil

[Nicolas Goaziou]

Hello,

Alexis <flexibeast@gmail.com> writes:

> On 2015-02-18T06:25:57+1100, Glenn Morris said:
>
> GM> Damian Nadales wrote:
>
>>> - Run emacs -Q
>>> - Create an org-mode file (i.e. ``myorgfile.org``)
>>> - Insert the following text:
>>> o #+BEGIN_SRC C++
>>> #+END_SRC
>>> - Edit the source block by placing the cursor inside the SRC block.
>>> - Start C++ mode (c++-mode)
>>> - Try to kill the buffer.
>
> GM> Please do
>
> GM> M-x toggle-debug-on-error
>
> GM> repeat the problem, and post the resulting backtrace.  (I can't
> GM> reproduce it.)
>
> Running a manually compiled Emacs 24.4.1 on Debian Wheezy(+updates)
> x86_64, and following the above steps, i can't reproduce this either.
>
> From the above description, i assume by the "Start C++ mode" line,
> you're not moving the cursor inside the source block and then doing:
>
>    C-c '
>
> (i.e. `org-edit-special`) in order to open a c++-mode buffer for
> editing the block contents?

This should be fixed. Thank you.

However, it is not a good idea to change major mode in an edit buffer,
as it removes local variables used to synchronize with the source block.
Proper major mode, when non-trivial, should be defined with
``org-src-lang-modes' instead.


Regards,

-- 
Nicolas Goaziou