Robert Allan JamesandClaude Sonnet 5
05ae7aa886
mama_word_switch_mark_work()'s stack-underflow guard checked dsp < 2, requiring 3+ items, when it only ever needs the 2 IDX>NAME leaves it (caddr u). Since dsp is index-based (2 items == dsp 1), this rejected every normal call. MSG-SEND tail-calls SWITCH-MARK-WORK unconditionally, so this fired on every message sent anywhere in the system -- visible only where a caller happened to check the target VM's error flag afterward (mama_word_vm_exec()'s "VM-EXEC: ERROR in Artemis" report). Verified clean on all 3 architectures: boot reaches Startup: Artemis live -> zuse@Hera] ok> with no VM-EXEC: ERROR line at all. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BWpNjdwPtFLuVLaAq44L9K