fix: Don't panic when propagating #3311
                
     Merged
            
            
          
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I thought I was adding a test in #3305. Maybe I considered the
clap_complete changes sufficient for this. Doing more
debug_assertswould be good also.
Unsetting
PropagateVersionhelps in some cases but we need to unset itglobally to override the global propagation.
Fixes #3310