error: trait aliases cannot be `auto`
  --> $DIR/syntax-fail.rs:4:1
   |
LL | auto trait A = Foo;
   | ^^^^^^^^^^^^^^^^^^^ trait aliases cannot be `auto`

error: trait aliases cannot be `unsafe`
  --> $DIR/syntax-fail.rs:5:1
   |
LL | unsafe trait B = Foo;
   | ^^^^^^^^^^^^^^^^^^^^^ trait aliases cannot be `unsafe`

error: bounds are not allowed on trait aliases
  --> $DIR/syntax-fail.rs:7:8
   |
LL | trait C: Ord = Eq;
   |        ^^^^^

error: bounds are not allowed on trait aliases
  --> $DIR/syntax-fail.rs:8:8
   |
LL | trait D: = Eq;
   |        ^

error: aborting due to 4 previous errors