|  | error[E0015]: cannot use `for` loop on `std::ops::Range<i32>` in constants | 
|  | --> $DIR/const-for-feature-gate.rs:4:14 | 
|  | | | 
|  | LL |     for _ in 0..5 {} | 
|  | |              ^^^^ | 
|  | | | 
|  | = note: calls in constants are limited to constant functions, tuple structs and tuple variants | 
|  |  | 
|  | error[E0015]: cannot use `for` loop on `std::ops::Range<i32>` in constants | 
|  | --> $DIR/const-for-feature-gate.rs:4:14 | 
|  | | | 
|  | LL |     for _ in 0..5 {} | 
|  | |              ^^^^ | 
|  | | | 
|  | = note: calls in constants are limited to constant functions, tuple structs and tuple variants | 
|  | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` | 
|  |  | 
|  | error: aborting due to 2 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0015`. |