How to inspect hook variables with byte compilation

How to inspect hook variables with byte compilation

[Ross Vandegrift]

Hi folks,

I'm using emacs 28.2 from Debian.  I'm trying to troubleshoot an issue
with my org-mode setup.  So I inspect org-mode-hook with C-h v.

The value is a byte-compiled function, and clicking on the bytecode
gives me a disassemly.  How do I get human-readable output?

Output:

  org-mode-hook is a variable defined in ‘org.el’.

  Its value is shown below.

  Mode hook for Org mode, run after the mode was turned on.

    This variable may be risky if used as a file-local variable.
    You can customize this variable.

  Value:
  (#f(compiled-function
      ()
      #<bytecode -0x1356c8e47eb756a0>)
     #f(compiled-function
        ()
        #<bytecode -0x1356c8e6dc1bfaa0>)
     org-babel-result-hide-spec org-babel-hide-all-hashes)
  Original value was nil

  [back]

Thanks,
Ross

Please CC me, I'm not subscribed.

Re: How to inspect hook variables with byte compilation

[Robert Pluim]

>>>>> On Wed, 27 Sep 2023 10:33:28 -0700, Ross Vandegrift <ross@kallisti.us> said:

    Ross> Hi folks,
    Ross> I'm using emacs 28.2 from Debian.  I'm trying to troubleshoot an issue
    Ross> with my org-mode setup.  So I inspect org-mode-hook with C-h v.

    Ross> The value is a byte-compiled function, and clicking on the bytecode
    Ross> gives me a disassemly.  How do I get human-readable output?

    Ross> Output:

    Ross>   org-mode-hook is a variable defined in ‘org.el’.

    Ross>   Its value is shown below.

    Ross>   Mode hook for Org mode, run after the mode was turned on.

    Ross>     This variable may be risky if used as a file-local variable.
    Ross>     You can customize this variable.

    Ross>   Value:
    Ross>   (#f(compiled-function
    Ross>       ()
    Ross>       #<bytecode -0x1356c8e47eb756a0>)
    Ross>      #f(compiled-function
    Ross>         ()
    Ross>         #<bytecode -0x1356c8e6dc1bfaa0>)
    Ross>      org-babel-result-hide-spec org-babel-hide-all-hashes)
    Ross>   Original value was nil

Find out which file is setting the org-mode-hook, and temporarily move
its .elc version out of the way.

Robert
-- 

Re: How to inspect hook variables with byte compilation

[Ross Vandegrift]

Hi Robert,

On Thu, Sep 28, 2023 at 10:02:21AM +0200, Robert Pluim wrote:
>     Ross> Output:
> 
>     Ross>   org-mode-hook is a variable defined in ‘org.el’.
> 
>     Ross>   Its value is shown below.
> 
>     Ross>   Mode hook for Org mode, run after the mode was turned on.
> 
>     Ross>     This variable may be risky if used as a file-local variable.
>     Ross>     You can customize this variable.
> 
>     Ross>   Value:
>     Ross>   (#f(compiled-function
>     Ross>       ()
>     Ross>       #<bytecode -0x1356c8e47eb756a0>)
>     Ross>      #f(compiled-function
>     Ross>         ()
>     Ross>         #<bytecode -0x1356c8e6dc1bfaa0>)
>     Ross>      org-babel-result-hide-spec org-babel-hide-all-hashes)
>     Ross>   Original value was nil
> 
> Find out which file is setting the org-mode-hook, and temporarily move
> its .elc version out of the way.

That's a bit of a puzzler too - the only place my config modifies it is
in ~/.emacs.d/init.el.  AFAIK, init.el isn't byte-compiled?  At least I
can't find any init elc files:

  $ find ~/.emacs.d -name 'init*.elc'
  $

I tried moving all of the binary eln files which matched `org-mode-hook`
out of the way, but it didn't help.

Thanks,
Ross

Re: How to inspect hook variables with byte compilation

[Robert Pluim]

>>>>> On Thu, 28 Sep 2023 08:43:47 -0700, Ross Vandegrift <ross@kallisti.us> said:

    Ross> Hi Robert,
    Ross> On Thu, Sep 28, 2023 at 10:02:21AM +0200, Robert Pluim wrote:
    Ross> Output:
    >> 
    Ross> org-mode-hook is a variable defined in ‘org.el’.
    >> 
    Ross> Its value is shown below.
    >> 
    Ross> Mode hook for Org mode, run after the mode was turned on.
    >> 
    Ross> This variable may be risky if used as a file-local variable.
    Ross> You can customize this variable.
    >> 
    Ross> Value:
    Ross> (#f(compiled-function
    Ross> ()
    Ross> #<bytecode -0x1356c8e47eb756a0>)
    Ross> #f(compiled-function
    Ross> ()
    Ross> #<bytecode -0x1356c8e6dc1bfaa0>)
    Ross> org-babel-result-hide-spec org-babel-hide-all-hashes)
    Ross> Original value was nil
    >> 
    >> Find out which file is setting the org-mode-hook, and temporarily move
    >> its .elc version out of the way.

    Ross> That's a bit of a puzzler too - the only place my config modifies it is
    Ross> in ~/.emacs.d/init.el.  AFAIK, init.el isn't byte-compiled?  At least I
    Ross> can't find any init elc files:

    Ross>   $ find ~/.emacs.d -name 'init*.elc'
    Ross>   $

    Ross> I tried moving all of the binary eln files which matched `org-mode-hook`
    Ross> out of the way, but it didn't help.

Then thereʼs something in org thatʼs setting it. Try

(add-variable-watcher 'org-mode-hook (lambda (s n o w)
                                        (debug)))

which will give you a backtrace when something changes it.

Robert
--