Rollup merge of #49117 - nivkner:fixme_fixup3, r=estebank

address some FIXME whose associated issues were marked as closed

part of #44366

diff --cc src/librustc_resolve/resolve_imports.rs
Simple merge

diff --cc src/librustc_typeck/check/mod.rs
Simple merge

diff --cc src/libsyntax/parse/mod.rs
Simple merge

diff --cc src/libsyntax/test.rs
Simple merge