Re: master c4d34d2: CC Mode: Enhance C++ Mode raw strings to multi-line strings for any language

[Alan Mackenzie <acm@muc.de>]

Hello, Basil.

On Wed, Aug 18, 2021 at 19:20:39 +0000, Alan Mackenzie wrote:
> On Wed, Aug 18, 2021 at 17:37:25 +0000, Alan Mackenzie wrote:
> > On Wed, Aug 18, 2021 at 01:02:52 +0100, Basil L. Contovounesios wrote:
> > > Basil L. Contovounesios [2021-08-17 20:37 +0100] wrote:

> [ .... ]

> > > > It's hanged several times for me locally on Debian Testing after
> > > > a bootstrap, FWIW.  Haven't yet had time to investigate further.

> > > I'm able to reproduce the hang in the test
> > > electric-layout-plainer-c-mode-use-c-style with:

> > >   make TEST_LOAD_EL=no test/electric-tests

> > > The hang seems to be happening in c-beginning-of-macro, from the
> > > second call to c-point-syntax in
> > > electric-layout-for-c-style-du-jour.

> > I can't reproduce the hang with your recipe, either.  For what it's
> > worth, I'm running a pure 64-bit AMD-Ryzen Gentoo Gnu/Linux system,
> > with the following Emacs configuration:

> > Configured using: 'configure --with-gif=no --with-tiff=no --with-gpm
> > --with-native-compilation'

> > Configured features:
> > ACL CAIRO DBUS FREETYPE GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
> > LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG
> > SECCOMP SOUND THREADS TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB

> > > HTH,

> > Maybe I'll try configuring with some of the options you've been using
> > (that you reported in a later post).

> To my above configuration, I added --enable-checking=structs, and with
> that I can reproduce the hang using your recipe above.

> But with TEST_LOAD_EL=yes, the test runs to completion.  This suggests
> there is some bug in the compilation of some .el file -
> electric-test.el, perhaps?  Are we talking about a .elc or a .eln here?

You say c-beginning-of-macro seems to be hanging.  js.el advises
c-beginning-of-macro (along with two other CC Mode functions), and this
may have something to do with it.

At least, if I comment out all the lines in test/lisp/electric-tests.el
with "js" in them (apart from the first occurrence, where one just
comments out "js-mode" from the line), then the hang doesn't happen.

Something to think about.

> > > -- 
> > > Basil

-- 
Alan Mackenzie (Nuremberg, Germany).