testhandlertable test crashes with Bus Error on sparc64

[glaubitz]

On Debian unstable on sparc64, the test testhandlertable crashes with Bus Error which indicates incorrect alignment.

From the build log [1]:

      Start 10: testhandlertable

10: Test command: /<<PKGBUILDDIR>>/obj-sparc64-linux-gnu/test/testhandlertable
10: Working Directory: /<<PKGBUILDDIR>>/obj-sparc64-linux-gnu/test
10: Test timeout computed to be: 10000000
10/16 Test #10: testhandlertable .................Bus error***Exception:   0.01 sec

I tried to obtain a backtrace, but that did not work:

(sid_sparc64-dchroot)glaubitz@stadler:~/fcitx/fcitx-4.2.9.9$ gdb ./obj-sparc64-linux-gnu/test/testhandlertable
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Reading symbols from ./obj-sparc64-linux-gnu/test/testhandlertable...
(gdb) r
Starting program: /home/glaubitz/fcitx/fcitx-4.2.9.9/obj-sparc64-linux-gnu/test/testhandlertable

Program received signal SIGBUS, Bus error.
0xfff800010030a290 in ?? ()
(gdb) bt
#0  0xfff800010030a290 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) q
A debugging session is active.

        Inferior 1 [process 474836] will be killed.

Quit anyway? (y or n) y
(sid_sparc64-dchroot)glaubitz@stadler:~/fcitx/fcitx-4.2.9.9$

Looking at test/testhandlertable.c, I cannot see anything that looks like an unaligned access though.

[1] https://buildd.debian.org/status/fetch.php?pkg=fcitx&arch=sparc64&ver=1%3A4.2.9.9-1&stamp=1699700786&raw=0