I see the same illegal instruction with the latest packages and latest base:
fuckup$ hugo Illegal instruction (core dumped) fuckup$ dmesg | head -1 OpenBSD 7.5-beta (GENERIC.MP) #7: Tue Feb 20 11:09:18 MST 2024 ktrace: 92986 hugo CALL mmap(0,0x40000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0) 92986 hugo RET mmap 11072319488/0x293f63000 92986 hugo CALL mmap(0,0x40000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0) 92986 hugo RET mmap 10030714880/0x255e09000 92986 hugo CALL mmap(0,0x3000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0) 92986 hugo RET mmap 11094835200/0x2954dc000 92986 hugo CALL kbind(0x7e5873ba8528,24,0x47f5f02b048179b4) 92986 hugo RET kbind 0 92986 hugo CALL kbind(0x7e5873ba8528,24,0x47f5f02b048179b4) 92986 hugo RET kbind 0 92986 hugo CALL kbind(0x7e5873ba8508,24,0x47f5f02b048179b4) 92986 hugo RET kbind 0 92986 hugo PSIG SIGILL SIG_DFL code=ILL_ILLOPC addr=0x2ff6d00 trapno=21 92986 hugo NAMI "hugo.core"