It usually makes no sense to examine the error variables if there was no error. Only inspect them if you know something failed (which doesn't mean
IPC::Run really uses them, I'm not able to run your example code to replicate the problem).
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,