tests/gireg.lua fails with 32bits and lua5-1: 7:type_uint32 / 74:enum

Hi,

The testsuite (snapshot a1308b23b07a787d21fad86157b0b60eb3079f64) fails with 32bits / lua5-1:

 * lua5-1: running lua_src_test
 * Starting Xvfb ...
 * Xvfb started on DISPLAY=:0
meson test --print-errorlogs --num-processes 16
ninja: Entering directory `/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson'
ninja: Jobserver mode detected: -j16 -l16 --jobserver-auth=fifo:/dev/steve
ninja: no work to do.
1/2 lgi:multiple states OK              0.04s
2/2 lgi:regress         FAIL            0.85s   exit status 1
>>> MALLOC_PERTURB_=84 MSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 GI_TYPELIB_PATH=/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/tests UBSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 MESON_TEST_ITERATION=1 ASAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1 LD_LIBRARY_PATH=/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/tests LUA_CPATH='/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/?.so;/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/?.dll' LUA_PATH='/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1/?.lua;/var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/?.lua' /usr/bin/dbus-run-session /usr/bin/lua5.1 /var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/../lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua
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stdout:
SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
gireg   :  7:type_uint32                        FAIL
             ...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:146: got value `-1', expected `4294967295'
stack traceback:
        [C]: in function 'error'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:88: in function 'fail'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:91: in function 'check'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:101: in function 'checkv'
        ...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:146: in function <...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:139>
        [C]: in function 'xpcall'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:50: in function 'runfunc'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:73: in function 'run'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:142: in main chunk
        [C]: ?
gireg   : 74:enum                               FAIL
             ...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:818: failure
stack traceback:
        [C]: in function 'error'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:88: in function 'fail'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:91: in function 'check'
        ...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:818: in function <...a787d21fad86157b0b60eb3079f64-lua5-1/tests/gireg.lua:804>
        [C]: in function 'xpcall'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:50: in function 'runfunc'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:73: in function 'run'
        ...7a787d21fad86157b0b60eb3079f64-lua5-1/tests/test.lua:142: in main chunk
        [C]: ?
gireg   : FAILED 2 of 114 tests
marshal : all 1 tests passed.
corocbk : all 3 tests passed.
record  : all 1 tests passed.
gobject : all 17 tests passed.
glib    : all 6 tests passed.
variant : all 16 tests passed.
dbus    : all 3 tests passed.
gtk     : all 22 tests passed.
cairo   : all 15 tests passed.
pango   : all 1 tests passed.
gio     : all 2 tests passed.
progress: all 1 tests passed.
stderr:
dbus-daemon[77]: [session uid=250 pid=77 pidfd=5] Activating service name='org.a11y.Bus' requested by ':1.0' (uid=250 pid=79 comm="/usr/bin/lua5.1 /var/tmp/portage/dev-lua/lgi-0.9.2" label="unconfined")
dbus-daemon[77]: [session uid=250 pid=77 pidfd=5] Successfully activated service 'org.a11y.Bus'

(lua5.1:79): Lgi-WARNING **: 07:13:45.631: Error raised while calling 'lgi.cbk (number): Regress': attempt to call a number value

(lua5.1:79): Lgi-WARNING **: 07:13:45.631: Error raised while calling 'lgi.cbk (string): Regress': attempt to call a string value

(lua5.1:79): Lgi-WARNING **: 07:13:45.631: Error raised while calling 'lgi.cbk (table: 0x58798ae0): Regress': attempt to call a table value

(lua5.1:79): Lgi-WARNING **: 07:13:45.631: Error raised while calling 'lgi.cbk (table: 0x587cf4b0): Regress': attempt to call a table value
dbus-daemon[89]: Activating service name='org.a11y.atspi.Registry' requested by ':1.0' (uid=250 pid=79 comm="/usr/bin/lua5.1 /var/tmp/portage/dev-lua/lgi-0.9.2" label="unconfined")
dbus-daemon[89]: Successfully activated service 'org.a11y.atspi.Registry'

(lua5.1:79): Gtk-WARNING **: 07:13:46.280: ../gtk-3.24.51/gtk/gtktreemodel.c:657: Invalid path set_sort_func passed to gtk_tree_path_new_from_string
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Summary of Failures:

2/2 lgi:regress         FAIL            0.85s   exit status 1

Ok:                1   
Fail:              1   

Full log written to /var/tmp/portage/dev-lua/lgi-0.9.2_p20251219/work/lgi-a1308b23b07a787d21fad86157b0b60eb3079f64-lua5-1-meson/meson-logs/testlog.txt

Start by reproducing the failures with the gireg tests in tests/gireg.lua under 32-bit Lua 5.1, using the reported Meson test command. Inspect the checks at lines 146 and 818 and the surrounding type_uint32 and enum cases. Done means both cases pass and the lgi:regress suite reports no failures.