Follow-up Comment #3, bug #64229 (project groff): "Infinite input causes infinite execution time and consumes infinite resources" doesn't particularly surprise me. Do other command-line utilities fare any better? Things like "cat" and "grep" have the luxury of being able to emit output before all input has been read, but "yes abcdefghijklm | sort" seemed happy to churn the CPU as long as I'd let it.
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