Auto merge of #130680 - saethlin:module-name-to-str, r=jieyouxu

Call module_name_to_str instead of just unwrapping

This makes the ICE message in rust-lang/rust#130678 more clear. It looks like not calling this function was just an oversight in rust-lang/rust#76859, but clearly not a major one because it's taken us 4 years to notice.

try-job: i686-msvc