error[E0659]: `sub` is ambiguous (name vs any other name during import resolution)
  --> $DIR/block-scoped-shadow-nested.rs:16:13
   |
LL |         use sub::bar; //~ ERROR `sub` is ambiguous
   |             ^^^ ambiguous name
   |
note: `sub` could refer to the module imported here
  --> $DIR/block-scoped-shadow-nested.rs:14:9
   |
LL |     use my::sub;
   |         ^^^^^^^
note: `sub` could also refer to the module defined here
  --> $DIR/block-scoped-shadow-nested.rs:9:1
   |
LL | / mod sub {
LL | |     pub fn bar() {}
LL | | }
   | |_^
   = help: use `self::sub` to refer to the module unambiguously

error: aborting due to previous error

For more information about this error, try `rustc --explain E0659`.