871f047c4c
always print nice 'std not found' error when std is not found Fixes https://github.com/rust-lang/miri/issues/3529 Arguably Miri is doing something odd by letting people create no-std sysroots for arbitrary targets -- but equally arguably, there's no good reason for rustc to special-case the host triple here. Being a non-host triple does not imply the target is a no-std target, after all.