error[E0423]: expected value, found builtin type `u16`
  --> $DIR/resolve-primitive-fallback.rs:3:23
   |
LL |     std::mem::size_of(u16);
   |                       ^^^ not a value

error[E0412]: cannot find type `u8` in the crate root
  --> $DIR/resolve-primitive-fallback.rs:8:14
   |
LL |     let _: ::u8;
   |              ^^ not found in the crate root

error[E0061]: this function takes 0 parameters but 1 parameter was supplied
  --> $DIR/resolve-primitive-fallback.rs:3:5
   |
LL |     std::mem::size_of(u16);
   |     ^^^^^^^^^^^^^^^^^^^^^^ expected 0 parameters

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0061, E0412, E0423.
For more information about an error, try `rustc --explain E0061`.