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
   |
help: consider importing this builtin type
   |
LL + use std::primitive::u8;
   |
help: if you import `u8`, refer to it directly
   |
LL -     let _: ::u8;
LL +     let _: u8;
   |

error[E0061]: this function takes 0 arguments but 1 argument was supplied
  --> $DIR/resolve-primitive-fallback.rs:3:5
   |
LL |     std::mem::size_of(u16);
   |     ^^^^^^^^^^^^^^^^^ --- unexpected argument
   |
note: function defined here
  --> $SRC_DIR/core/src/mem/mod.rs:LL:COL
help: remove the extra argument
   |
LL -     std::mem::size_of(u16);
LL +     std::mem::size_of();
   |

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`.