Eliminate some buggy unreachable!()s in expand_[option_]env() - #159940

Eliminate some buggy unreachable!()s in expand_[option_]env()#159940

rust-bors[bot] merged 2 commits into

rust-lang:mainrust-lang/rust:mainfrom

bal-e:env-macro-unreachablesbal-e/rust:env-macro-unreachablesCopy head branch name to clipboard