error[E0428]: the name `Foo` is defined multiple times
  --> $DIR/issue-21546.rs:18:1
   |
14 | mod Foo { }
   | ----------- previous definition of the module `Foo` here
...
18 | struct Foo;
   | ^^^^^^^^^^^ `Foo` redefined here
   |
   = note: `Foo` must be defined only once in the type namespace of this module

error[E0428]: the name `Bar` is defined multiple times
  --> $DIR/issue-21546.rs:28:1
   |
24 | mod Bar { }
   | ----------- previous definition of the module `Bar` here
...
28 | struct Bar(i32);
   | ^^^^^^^^^^^^^^^^ `Bar` redefined here
   |
   = note: `Bar` must be defined only once in the type namespace of this module

error[E0428]: the name `Baz` is defined multiple times
  --> $DIR/issue-21546.rs:39:1
   |
35 | struct Baz(i32);
   | ---------------- previous definition of the type `Baz` here
...
39 | mod Baz { }
   | ^^^^^^^^^^^ `Baz` redefined here
   |
   = note: `Baz` must be defined only once in the type namespace of this module

error[E0428]: the name `Qux` is defined multiple times
  --> $DIR/issue-21546.rs:50:1
   |
46 | struct Qux { x: bool }
   | ---------------------- previous definition of the type `Qux` here
...
50 | mod Qux { }
   | ^^^^^^^^^^^ `Qux` redefined here
   |
   = note: `Qux` must be defined only once in the type namespace of this module

error[E0428]: the name `Quux` is defined multiple times
  --> $DIR/issue-21546.rs:61:1
   |
57 | struct Quux;
   | ------------ previous definition of the type `Quux` here
...
61 | mod Quux { }
   | ^^^^^^^^^^^^ `Quux` redefined here
   |
   = note: `Quux` must be defined only once in the type namespace of this module

error[E0428]: the name `Corge` is defined multiple times
  --> $DIR/issue-21546.rs:72:1
   |
68 | enum Corge { A, B }
   | ------------------- previous definition of the type `Corge` here
...
72 | mod Corge { }
   | ^^^^^^^^^^^^^ `Corge` redefined here
   |
   = note: `Corge` must be defined only once in the type namespace of this module

error: aborting due to 6 previous errors