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* bug#59455: 29.0.50; Treesit font lock changes unrelated code
@ 2022-11-21 20:12 Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
  2022-11-22 10:05 ` Yuan Fu via Bug reports for GNU Emacs, the Swiss army knife of text editors
  2022-11-23 18:33 ` Yuan Fu
  0 siblings, 2 replies; 4+ messages in thread
From: Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2022-11-21 20:12 UTC (permalink / raw)
  To: 59455; +Cc: casouri


Hi Yuan!

I've noticed some strange behavior with font-lock lately in c-ts-mode,
and also in all the other ts modes.

to reproduce:

emacs -Q

C-x C-f foo.c RET

Insert this:

```
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */
/* lol lol lol lol lol lol lol lol lol lol */

int
foo (void)
{
  return 5;
}

int
foo (void)
{
  if (x)
    {
      return 5;
    }
}

int
foo (void)
{
  return 5;
}
```

M-x c-ts-mode RET

Now on the first line, repeatedly press 'M-c' (capitalize-word) and
watch the highlights of the rest of the file jump around.  Then try
undoing the changes by repeatedly pressing 'C-/' until you are back at
the state right after the first insert.  Now highlights are messed up.

I'm not sure where to start looking for this, but I do remember there
being some issues in Eglot with these "multi-edit" commands.

If you have some pointers for where to look I can dig around :)

Theo





^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2022-11-23 18:33 UTC | newest]

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2022-11-21 20:12 bug#59455: 29.0.50; Treesit font lock changes unrelated code Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-22 10:05 ` Yuan Fu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-22 11:03   ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-23 18:33 ` Yuan Fu

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