error[E0015]: cannot call non-const fn `non_const` in constants --> $DIR/issue-46843.rs:10:26 | LL | pub const Q: i32 = match non_const() { | ^^^^^^^^^^^ | = note: calls in constants are limited to constant functions, tuple structs and tuple variants error: aborting due to previous error For more information about this error, try `rustc --explain E0015`.