KOS_OP_MATCH_LOAD

• Style: EXTRA (LABEL, RAW, RAW): label, mark depth, slot index.

• Stack: [...] -> [..., v]; jump to a0 with nothing pushed when the slot is empty.

• Semantics: Push the value in slot a2 of the mark at depth a1. An index outside the mark’s slots raises SystemError.

• Compiler form: Emitted by the match compiler after an uncaptured repeat in a match arm, once per name of the repeat, ahead of the store that writes the list of its values to the variable; the jump skips that store.