xsrc/59555: new pixman crashes on macppc

[martin%NetBSD.org@localhost]

>Number:         59555
>Category:       xsrc
>Synopsis:       new pixman crashes on macppc
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 25 08:40:02 +0000 2025
>Originator:     Martin Husemann
>Release:        NetBSD 10.99.15
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD big-apple.aprisoft.de 10.99.15 NetBSD 10.99.15 (POWERMAC_G5.MP) #132: Thu Jul 24 19:39:38 CEST 2025 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/macppc/compile/POWERMAC_G5.MP macppc
Architecture: powerpc
Machine: macppc
>Description:

Since the last pixman update X does not work anymore on macppc:

(gdb) run
Starting program: /usr/X11R7/bin/X 

Program received signal SIGILL, Illegal instruction.
0xf6d9a160 in _pixman_implementation_create_vmx (
    fallback=fallback@entry=0xf58ac500)
    at /work/xsrc/external/mit/pixman/dist/pixman/pixman-vmx.c:2932
warning: 2932   /work/xsrc/external/mit/pixman/dist/pixman/pixman-vmx.c: No such file or directory

I thought this might be instruction probing, so I tried to continue:

(gdb) c
Continuing.

Program received signal SIGILL, Illegal instruction.
0xf6d9a160 in _pixman_implementation_create_vmx (
    fallback=fallback@entry=0xf58ac500)
    at /work/xsrc/external/mit/pixman/dist/pixman/pixman-vmx.c:2932
2932    in /work/xsrc/external/mit/pixman/dist/pixman/pixman-vmx.c
(gdb) c
Continuing.

Program terminated with signal SIGILL, Illegal instruction.
The program no longer exists.


>How-To-Repeat:
s/a

>Fix:
n/a