warning: any use of this value will cause an error --> $DIR/issue-43197.rs:10:20 | LL | const X: u32 = 0 - 1; | ------------ ^^^^^ attempt to compute `0_u32 - 1_u32`, which would overflow | note: the lint level is defined here --> $DIR/issue-43197.rs:3:9 | LL | #![warn(const_err)] | ^^^^^^^^^ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 warning: any use of this value will cause an error --> $DIR/issue-43197.rs:13:24 | LL | const Y: u32 = foo(0 - 1); | ------------ ^^^^^ attempt to compute `0_u32 - 1_u32`, which would overflow | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 error[E0080]: evaluation of constant value failed --> $DIR/issue-43197.rs:16:23 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors warning: erroneous constant used --> $DIR/issue-43197.rs:16:23 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = note: this warning originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0080]: evaluation of constant value failed --> $DIR/issue-43197.rs:16:26 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors warning: erroneous constant used --> $DIR/issue-43197.rs:16:26 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = note: this warning originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to 2 previous errors; 4 warnings emitted For more information about this error, try `rustc --explain E0080`. Future incompatibility report: Future breakage diagnostic: warning: any use of this value will cause an error --> $DIR/issue-43197.rs:10:20 | LL | const X: u32 = 0 - 1; | ------------ ^^^^^ attempt to compute `0_u32 - 1_u32`, which would overflow | note: the lint level is defined here --> $DIR/issue-43197.rs:3:9 | LL | #![warn(const_err)] | ^^^^^^^^^ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 Future breakage diagnostic: warning: any use of this value will cause an error --> $DIR/issue-43197.rs:13:24 | LL | const Y: u32 = foo(0 - 1); | ------------ ^^^^^ attempt to compute `0_u32 - 1_u32`, which would overflow | note: the lint level is defined here --> $DIR/issue-43197.rs:3:9 | LL | #![warn(const_err)] | ^^^^^^^^^ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 Future breakage diagnostic: warning: erroneous constant used --> $DIR/issue-43197.rs:16:23 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors | note: the lint level is defined here --> $DIR/issue-43197.rs:3:9 | LL | #![warn(const_err)] | ^^^^^^^^^ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = note: this warning originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) Future breakage diagnostic: warning: erroneous constant used --> $DIR/issue-43197.rs:16:26 | LL | println!("{} {}", X, Y); | ^ referenced constant has errors | note: the lint level is defined here --> $DIR/issue-43197.rs:3:9 | LL | #![warn(const_err)] | ^^^^^^^^^ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = note: this warning originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)