test: check stderr containment explicitly
test: check stderr containment explicitly

tshepang/cargo,tshepang/cargo,rust-lang/cargo,nipunn1313/cargo,nipunn1313/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,eminence/cargo,nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,rust-lang/cargo,rust-lang/cargo,nipunn1313/cargo,rustyhorde/cargo,rustyhorde/cargo,tshepang/cargo,rustyhorde/cargo,tshepang/cargo