|  | error[E0391]: cycle detected when evaluating type-level constant | 
|  | --> $DIR/const-size_of-cycle.rs:2:17 | 
|  | | | 
|  | LL |     bytes: [u8; std::mem::size_of::<Foo>()] | 
|  | |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | note: ...which requires const-evaluating + checking `Foo::bytes::{constant#0}`... | 
|  | --> $DIR/const-size_of-cycle.rs:2:17 | 
|  | | | 
|  | LL |     bytes: [u8; std::mem::size_of::<Foo>()] | 
|  | |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | = note: ...which requires computing layout of `Foo`... | 
|  | = note: ...which requires computing layout of `[u8; std::mem::size_of::<Foo>()]`... | 
|  | note: ...which requires normalizing `[u8; std::mem::size_of::<Foo>()]`... | 
|  | --> $DIR/const-size_of-cycle.rs:2:17 | 
|  | | | 
|  | LL |     bytes: [u8; std::mem::size_of::<Foo>()] | 
|  | |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | = note: ...which again requires evaluating type-level constant, completing the cycle | 
|  | note: cycle used when checking that `Foo` is well-formed | 
|  | --> $DIR/const-size_of-cycle.rs:2:17 | 
|  | | | 
|  | LL |     bytes: [u8; std::mem::size_of::<Foo>()] | 
|  | |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information | 
|  |  | 
|  | error: aborting due to 1 previous error | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0391`. |