GNU bug report logs - #74412
31.0.50; Treesit-outline conflict with outli in Emacs 31

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Taka Obsid <liaotx2 <at> gmail.com>
Cc: 74412 <at> debbugs.gnu.org
Subject: bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31
Date: Mon, 18 Nov 2024 14:29:38 +0200

> Date: Mon, 18 Nov 2024 10:59:00 +0800
> From: Taka Obsid <liaotx2 <at> gmail.com>
> 
> Hi, I'm using `java-ts-mode' and https://github.com/jdtsmith/outli.
> 
> While I tried to `revert-buffer' in a java file, it reports
> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
> 
> The backtrace is:
> 
> ```bt
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
> outline-map-region(#f(compiled-function () #<bytecode 
> -0x1964e0de811a96ab>) 1 31382)
> outline--hidden-headings-paths()
> outline-revert-buffer-restore-visibility()
> #f(compiled-function (f) #<bytecode 
> 0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>) 
> outline-revert-buffer-restore-visibility)
> revert-buffer(t)
> funcall-interactively(revert-buffer t)
> call-interactively(revert-buffer record nil)
> command-execute(revert-buffer record)
> execute-extended-command(nil "revert-buffer" "rev")
> funcall-interactively(execute-extended-command nil "revert-buffer" "rev")
> call-interactively(execute-extended-command nil nil)
> command-execute(execute-extended-command)
> ```
> 
> To repreduce it:
> 
> 1. start Emacs with `java-ts-mode' and `outli' installed;
> 
> 2. go to a java file;
> 
> 3. `M-x outli-mode';
> 
> 4. `M-x revert-buffer'.
> 
> The `outline-search-function' is `#'treesit-outline-search' and while I
> set it to `nil', I can successfully revert the buffer.
> 
> 
> ```
> emacs -q --eval "(progn
> (add-to-list 'load-path \"/path/to/java-ts-mode/\")
> (add-to-list 'load-path \"/path/to/outli/\")
> (require 'java-ts-mode)
> (require 'outli))"
> ```

Thanks, this seems to be a problem in the outli package?  Because the
error is signaled by one of its functions (a hook it places on
revert-buffer-function, I guess?).

Did you report this to the developer of outli?  If not, I suggest to
report it there first.

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