Test fails on zSystems s390x

[Oppzippy]

I'm updating the OpenSUSE package for lua-language-server to 3.18.2, and it depends on bee.lua at commit f55b698, so it's running bee.lua's tests. One of the bee.lua tests passes on x86_64, i586, aarch64, armv7l, and ppc64le, but it fails on s390x.

[  119s] [45/45] build/linux/bin/luamake bee.lua/test/test.lua
[  119s] FAILED: [code=1] build/linux/_/luamake_test 
[  119s] build/linux/bin/luamake bee.lua/test/test.lua
[  119s] OS:       	linux 7.1.3
[  119s] Arch:     	unknown
[  119s] Compiler: 	GCC 15.3.0
[  119s] CRT:      	libstdc++ 20260612 glibc 2.43
[  119s] DEBUG:    	false
[  119s] Lua:      	5.5
[  119s] ..F...........................................................................................................
[  119s] Failed tests:
[  119s] -------------
[  119s] 1) lua.test_next
[  119s] bee.lua/test/test_lua.lua:37: expected: Z, actual: A.
[  119s] stack traceback:
[  119s] 	bee.lua/test/test_lua.lua:37: in local 'checkOK'
[  119s] 	bee.lua/test/test_lua.lua:40: in upvalue 'lua.test_next'
[  119s] 
[  119s] Ran 110 tests in 0.493 seconds, 107 successes, 1 failures, 2 skipped

full log, see https://build.opensuse.org/package/live_build_log/home:autogits_obs_staging_bot:lua:PR:19/lua-language-server/openSUSE_Factory_zSystems/s390x