The kill-by-pattern and kill-by-name blockers never fire when the pattern arrives through a command substitution: an unquoted substitution contributes no word under the vanish reading, so the operand count the min_operands constraint reads is zero and pkill or killall with its pattern substituted in is allowed. A substitution standing as its own word is one operand of unknown text for that count. Found by review-guard finding 3.

The kill-by-pattern and kill-by-name blockers never fire when the pattern arrives through a command substitution: an unquoted substitution contributes no word under the vanish reading, so the operand count the min_operands constraint reads is zero and pkill or killall with its pattern substituted in is allowed. A substitution standing as its own word is one operand of unknown text for that count. Found by review-guard finding 3.

Grounds

• pursued: pkill and killall with the pattern substituted in block, while the group and parent selectors fed by a substitution stay allowed and positional compares keep the vanish reading; an allow of a substituted pattern, or a block of a substituted group id, would show it wrong