Error running timer ‘ahs-idle-function’: (wrong-type-argument number-or-marker-p nil)

[duianto]

An error appears when enabling auto-highlight-symbol-mode in a new buffer:

Error running timer ‘ahs-idle-function’: (wrong-type-argument number-or-marker-p nil)

Reproduction steps

• Create a new buffer test
• Type:

abc
abc

• Enable ahs mode: M-x auto-highlight-symbol-mode RET
• Wait 1 second

Observed

Error running timer ‘ahs-idle-function’: (wrong-type-argument number-or-marker-p nil)

Expected

The symbol at the cursor should be highlighted

Notes

Moving the cursor to another line, either up or down,
highlights the symbol under the cursor.

In the issue:
#8 (comment)
It was suggested to require the package first.

Make sure you require auto-higlight-symbol before calling these functions. These functions aren't autoload.

It didn't help to add:

(require 'auto-highlight-symbol)

to the init.el

It wasn't caused by the most recent update either,
because it also happened with the previous version:
auto-highlight-symbol-20210705.1351

The symbol is highlighted directly,
without the timer error message,
if the test buffer, is switched to: M-x emacs-lisp-mode RET
before enabling: M-x auto-highlight-symbol-mode RET

The default major mode when creating a new buffer is: fundamental-mode

System info

auto-highlight-symbol-20210708.1057
GNU Emacs 27.2 (build 1, x86_64-w64-mingw32) of 2021-03-26
Windows 21H1

[jcs090218]

Can you set debug-on-error to t and post the backtrace here? Thanks!

[duianto]

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  jit-lock--run-functions(1 8)
  jit-lock-fontify-now(1 8)
  ahs-fontify()
  ahs-highlight("abc" 5 8)
  ahs--do-hl()
  #f(compiled-function (win) #<bytecode 0x210731d>)(#<window 3 on test>)
  walk-windows(#f(compiled-function (win) #<bytecode 0x210731d>))
  ahs-idle-function()
  apply(ahs-idle-function nil)
  timer-event-handler([t 24807 19581 827983 nil ahs-idle-function nil nil 0])

[jcs090218]

I can't reproduce this and the backtrace does not make sense...

I have temporarily disabled with ignore-errors, 03cfc2f. Let me know if this would help? 😕

[duianto]

The latest version does not show the error running timer message.

Since you weren't able to reproduce the issue.

I also tested it in Manjaro (the test above was in Windows 21H1).

There is no error there either with the latest version of ahs.

But in both Manjaro and Win 21H1:
When those ignore-errors commands are removed,
then the error running timer message returns.