Re: Crash with --enable-checking and some glyphs

[Óscar Fuentes]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
>> No, of course that wasn't it.  It was --enable-checking.  D'oh.
>>
>> So I'm now able to reproduce the problem on the faster build machine,
>> which should help.  
>
> I assumed that this problem had to be pretty recent, but I'm now back to 
>
> 58bdfd7c540c49f3727c517c3599c9d601696caf
>
> (which is December 31sth 2020), and the abort is still there:
>
> xdisp.c:31003: Emacs fatal error: assertion failed: it->ascent >= 0 && 
> it->descent >= 0
> Fatal error 6: Aborted
> Backtrace:
> ./src/emacs(+0x19d4d1)[0x5628f66344d1]
> ./src/emacs(+0x50756)[0x5628f64e7756]
> ./src/emacs(+0x5653e)[0x5628f64ed53e]
>
> So perhaps it's more productive to try to debug it than trying to chase
> the problem down, but before I do that: Is anybody else seeing this?
>
> The way to reproduce it is:
>
> ./configure --enable-checking
> make
> ./src/emacs /tmp/crash.txt
>
> where that file contains the contents of:
>
> http://quimby.gnus.org/s/crash.txt
>
> I'm reproducing this on Debian/bullseye and Debian/bookworm.

Just tried with master (updated yesterday) on Debian Testing, configured
with

../emacs/configure --enable-checking
--without-toolkit-scroll-bars --with-x-toolkit=lucid --with-modules
--without-imagemagick

No crash.

Configured for 'x86_64-pc-linux-gnu'.

  Where should the build process find the source code?    ../emacs
  What compiler should emacs be built with?               gcc -g3 -O2
  Should Emacs use the GNU version of malloc?             no
    (The GNU allocators don't work with this system configuration.)
  Should Emacs use a relocating allocator for buffers?    no
  Should Emacs use mmap(2) for buffer allocation?         no
  What window system should Emacs use?                    x11
  What toolkit should Emacs use?                          LUCID
  Where do we find X Windows header files?                Standard dirs
  Where do we find X Windows libraries?                   Standard dirs
  Does Emacs use -lXaw3d?                                 yes
  Does Emacs use -lXpm?                                   yes
  Does Emacs use -ljpeg?                                  yes
  Does Emacs use -ltiff?                                  yes
  Does Emacs use a gif library?                           yes -lgif
  Does Emacs use a png library?                           yes -lpng16 -lz
  Does Emacs use -lrsvg-2?                                yes
  Does Emacs use -lwebp?                                  no
  Does Emacs use cairo?                                   yes
  Does Emacs use -llcms2?                                 no
  Does Emacs use imagemagick?                             no
  Does Emacs use native APIs for images?                  no
  Does Emacs support sound?                               yes
  Does Emacs use -lgpm?                                   no
  Does Emacs use -ldbus?                                  yes
  Does Emacs use -lgconf?                                 no
  Does Emacs use GSettings?                               yes
  Does Emacs use a file notification library?             yes -lglibc (inotify)
  Does Emacs use access control lists?                    no
  Does Emacs use -lselinux?                               yes
  Does Emacs use -lgnutls?                                yes
  Does Emacs use -lxml2?                                  yes
  Does Emacs use -lfreetype?                              yes
  Does Emacs use HarfBuzz?                                yes
  Does Emacs use -lm17n-flt?                              no
  Does Emacs use -lotf?                                   yes
  Does Emacs use -lxft?                                   no
  Does Emacs use -lsystemd?                               no
  Does Emacs use -ljansson?                               yes
  Does Emacs use the GMP library?                         yes
  Does Emacs directly use zlib?                           yes
  Does Emacs have dynamic modules support?                yes
  Does Emacs use toolkit scroll bars?                     no
  Does Emacs support Xwidgets?                            no
  Does Emacs have threading support in lisp?              yes
  Does Emacs support the portable dumper?                 yes
  Does Emacs support legacy unexec dumping?               no
  Which dumping strategy does Emacs use?                  pdumper
  Does Emacs have native lisp compiler?                   yes
  Does Emacs use version 2 of the the X Input Extension?  no