error[E0599]: no method named `foo` found for type `i32` in the current scope
  --> $DIR/issue-25385.rs:2:23
   |
LL |     ($e:expr) => { $e.foo() }
   |                       ^^^ method not found in `i32`
...
LL |     foo!(a);
   |     ------- in this macro invocation
   |
   = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no method named `foo` found for type `i32` in the current scope
  --> $DIR/issue-25385.rs:10:15
   |
LL |     foo!(1i32.foo());
   |               ^^^ method not found in `i32`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0599`.