bug#70383: Conf-mode[toml] badly set face property

[Alastair Irving]

On 14/04/2024 17:46, Eli Zaretskii wrote:
> > Date: Sun, 14 Apr 2024 11:25:08 +0100
> > From: Alastair Irving <alastair.j.irving@gmail.com>
> >
> > When editting TOML files with conf-mode[toml] the face property is being
> > set badly on certain characters.  This occurs in Emacs 29.3 (running
> > with -q) but has been present in older versions.  Steps to reproduce:
> >
> > 1. Create a file test.toml containing the following:
> >
> >
> > [package]
> > name = "test"
> > # See more keys and their definitions at
> > https://doc.rust-lang.org/cargo/reference/manifest.html
> > [dependencies]
> >
> > 2. Navigate to the d in dependencies and evaluate
> >
> > (text-properties-at (point))
> >
> > The output for me looks like
> >
> > (face (font-lock-type-face font-lock-type-face font-lock-type-face
> > font-lock-type-face font-lock-type-face font-lock-ty\
> > pe-face font-lock-type-face font-lock-type-face font-lock-type-face
> > font-lock-type-face
> >
> >
> > It looks like something is wrong in the font-lock setup and the same
> > face is being applied very many times.
> I cannot reproduce this here, neither in Emacs 29 nor in Emacs 30.
> What version of the TOML grammar library are you using?
I don't think it's using a TOML grammar library, just conf-mode bundled 
with EMACS "The major mode is Conf[TOML] mode defined in conf-mode.el".  
I think an extra newline was inserted in the TOML I pasted (in the 
comment before the URL), it should be 4 lines total. I've attached the 
exact file.
> Jostein and Yuan, can you please look into this?

test.toml
Description: Text document