die, when switching to/use a lib that does not exist.
die, when switching to/use a lib that does not exist.

bug ref: https://github.com/gugod/App-perlbrew/issues/432

ptolemarch/App-perlbrew,Asuza/App-perlbrew,Asuza/App-perlbrew,josl/App-perlbrew,josl/App-perlbrew,Asuza/App-perlbrew,josl/App-perlbrew,ptolemarch/App-perlbrew,ptolemarch/App-perlbrew