bug#74383: 29.4; Emacs PGTK crashes on Void Linux

[Eli Zaretskii <eliz@gnu.org>]

> From: Taha Aziz Ben Ali <ba.tahaaziz@gmail.com>
> Date: Sat, 16 Nov 2024 13:42:39 +0100
> 
> I've been failing to get Emacs to launch under Sway on Void Linux, the
> configuration I'm using was working fine on Arch Linux (using the same
> Emacs version). Note that `emacs -Q' also segfaults, but `emacs -nw' is
> able to launch emacs with all of my configuration without a single
> warning.
> 
> You can find the backtrace leading up to this error in this paste:
> 
>   https://paste.sr.ht/~grtcdr/c39dad4913262557228d1158680f52613b728c6a
> 
> I tracked the issue down to a cairo_surface_create_similar_image() call
> that results in the crash.
> 
> Before the program crashes, a warning about the "xpm" image type not
> being supported is shown which may be relevant:
> 
>   (emacs:8670): GdkPixbuf-WARNING **: 13:38:44.606: Error loading XPM
>   image loader: Image type “xpm” is not supported

Do you have the XPM library installed and available to Emacs?

Your build details indicate that Emacs was configured to be built with
XPM:

> Configured using:
>  'configure --with-pgtk --prefix=/usr --sysconfdir=/etc
>  --sbindir=/usr/bin --bindir=/usr/bin --mandir=/usr/share/man
>  --infodir=/usr/share/info --localstatedir=/var
>  --host=x86_64-unknown-linux-musl --build=x86_64-unknown-linux-musl
>  '--libdir=${exec_prefix}/lib64' --with-file-notification=inotify
>  --with-modules --with-jpeg --with-tiff --with-gif --with-png
>  --with-webp --with-xpm --with-rsvg --without-imagemagick --with-xml2
               ^^^^^^^^^^
>  --with-gnutls --with-sound --with-m17n-flt --with-json --with-harfbuzz
>  --with-cairo --with-libgmp --with-sqlite3 --with-tree-sitter
>  --with-native-compilation=aot 'CFLAGS=-fno-PIE -mtune=generic -O2 -pipe
>  -g -ffile-prefix-map=/builddir/emacs-29.4=.' 'CPPFLAGS= '
>  'LDFLAGS=-no-pie -Wl,--as-needed ''

But the features actually available to Emacs don't include XPM:

> Configured features:
> ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
> LCMS2 LIBOTF LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG
> RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER
> WEBP XIM GTK3 ZLIB

So I wonder how this happened.

Did you build Emacs yourself, or was it installed from some distro?