error[E0744]: `while let` is not allowed in a `const`
  --> $DIR/issue-51714.rs:11:17
   |
LL |     [(); return while let Some(n) = Some(0) {}];
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0572]: return statement outside of function body
  --> $DIR/issue-51714.rs:2:14
   |
LL |     |_:  [_; return || {}] | {};
   |              ^^^^^^^^^^^^

error[E0572]: return statement outside of function body
  --> $DIR/issue-51714.rs:5:10
   |
LL |     [(); return || {}];
   |          ^^^^^^^^^^^^

error[E0572]: return statement outside of function body
  --> $DIR/issue-51714.rs:8:10
   |
LL |     [(); return |ice| {}];
   |          ^^^^^^^^^^^^^^^

error[E0572]: return statement outside of function body
  --> $DIR/issue-51714.rs:11:10
   |
LL |     [(); return while let Some(n) = Some(0) {}];
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 5 previous errors

Some errors have detailed explanations: E0572, E0744.
For more information about an error, try `rustc --explain E0572`.