error[E0659]: `Foo` is ambiguous
  --> $DIR/block-scoped-shadow.rs:11:9
   |
LL |     use Foo::*;
   |         ^^^ ambiguous name
   |
   = note: ambiguous because of multiple potential import sources
note: `Foo` could refer to the enum defined here
  --> $DIR/block-scoped-shadow.rs:10:5
   |
LL |     enum Foo { A, B }
   |     ^^^^^^^^^^^^^^^^^
note: `Foo` could also refer to the enum defined here
  --> $DIR/block-scoped-shadow.rs:5:1
   |
LL | enum Foo {}
   | ^^^^^^^^^^^
   = help: use `crate::Foo` to refer to this enum unambiguously

error[E0659]: `std` is ambiguous
  --> $DIR/block-scoped-shadow.rs:18:9
   |
LL |     use std as foo;
   |         ^^^ ambiguous name
   |
   = note: ambiguous because of multiple potential import sources
note: `std` could refer to the enum defined here
  --> $DIR/block-scoped-shadow.rs:17:5
   |
LL |     enum std {}
   |     ^^^^^^^^^^^
note: `std` could also refer to the struct defined here
  --> $DIR/block-scoped-shadow.rs:7:1
   |
LL | struct std;
   | ^^^^^^^^^^^
   = help: use `crate::std` to refer to this struct unambiguously

error[E0659]: `std` is ambiguous
  --> $DIR/block-scoped-shadow.rs:18:9
   |
LL |     use std as foo;
   |         ^^^ ambiguous name
   |
   = note: ambiguous because of multiple potential import sources
note: `std` could refer to the function defined here
  --> $DIR/block-scoped-shadow.rs:16:5
   |
LL |     fn std() {}
   |     ^^^^^^^^^^^
note: `std` could also refer to the unit struct defined here
  --> $DIR/block-scoped-shadow.rs:7:1
   |
LL | struct std;
   | ^^^^^^^^^^^
   = help: use `crate::std` to refer to this unit struct unambiguously

error: aborting due to 3 previous errors

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