error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
  --> $DIR/not-an-allocator.rs:2:1
   |
LL | static A: usize = 0;
   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
   |
   = note: required by `std::alloc::GlobalAlloc::alloc`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
  --> $DIR/not-an-allocator.rs:2:1
   |
LL | static A: usize = 0;
   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
   |
   = note: required by `std::alloc::GlobalAlloc::dealloc`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
  --> $DIR/not-an-allocator.rs:2:1
   |
LL | static A: usize = 0;
   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
   |
   = note: required by `std::alloc::GlobalAlloc::realloc`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `usize: std::alloc::GlobalAlloc` is not satisfied
  --> $DIR/not-an-allocator.rs:2:1
   |
LL | static A: usize = 0;
   | ^^^^^^^^^^^^^^^^^^^^ the trait `std::alloc::GlobalAlloc` is not implemented for `usize`
   |
   = note: required by `std::alloc::GlobalAlloc::alloc_zeroed`
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0277`.