error[E0080]: evaluation of constant value failed --> tests/compile/too_many.rs:1:1 | 1 | / bit_struct::bit_struct! { 2 | | struct TooMany(u16) { 3 | | a: u8, 4 | | b: u8, 5 | | c: bit_struct::u1 6 | | } 7 | | } | |_^ attempt to compute `0_usize - 1_usize`, which would overflow | = note: this error originates in the macro `$crate::impl_fields` which comes from the expansion of the macro `bit_struct::bit_struct` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0080]: evaluation of constant value failed --> tests/compile/too_many.rs:1:1 | 1 | / bit_struct::bit_struct! { 2 | | struct TooMany(u16) { 3 | | a: u8, 4 | | b: u8, 5 | | c: bit_struct::u1 6 | | } 7 | | } | |_^ attempt to compute `0_usize - 1_usize`, which would overflow | = note: this error originates in the macro `$crate::impl_fields` which comes from the expansion of the macro `bit_struct::bit_struct` (in Nightly builds, run with -Z macro-backtrace for more info)