Prevent invalid use of -gputasks
Previously a single-rank run would permit -nb gpu -pme gpu -gputasks 01, report using it, and silently use GPU 0 in the implementation.
Fixes #4602 (closed)
Edited by Mark Abraham
Previously a single-rank run would permit -nb gpu -pme gpu -gputasks 01, report using it, and silently use GPU 0 in the implementation.
Fixes #4602 (closed)