error[E0391]: cyclic dependency detected
  --> $DIR/issue-36163.rs:14:9
   |
LL |     B = A, //~ ERROR E0391
   |         ^ cyclic reference
   |
note: the cycle begins when const-evaluating `Foo::B::{{initializer}}`...
  --> $DIR/issue-36163.rs:14:9
   |
LL |     B = A, //~ ERROR E0391
   |         ^
note: ...which then requires processing `Foo::B::{{initializer}}`...
  --> $DIR/issue-36163.rs:14:9
   |
LL |     B = A, //~ ERROR E0391
   |         ^
note: ...which then requires const-evaluating `A`...
  --> $DIR/issue-36163.rs:11:1
   |
LL | const A: isize = Foo::B as isize;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which then requires computing layout of `Foo`...
  --> $DIR/issue-36163.rs:11:18
   |
LL | const A: isize = Foo::B as isize;
   |                  ^^^^^^
   = note: ...which then again requires const-evaluating `Foo::B::{{initializer}}`, completing the cycle.

error: aborting due to previous error

For more information about this error, try `rustc --explain E0391`.