1error[E0277]: the trait bound `T: KnownLayout` is not satisfied 2 --> tests/ui-stable/mid_compile_pass.rs:59:26 3 | 459 | fn test_kl13<T>(t: T) -> impl KnownLayout { 5 | ^^^^^^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `T`, which is required by `KL13<T>: KnownLayout` 6 | 7note: required for `KL13<T>` to implement `KnownLayout` 8 --> tests/ui-stable/mid_compile_pass.rs:55:10 9 | 1055 | #[derive(KnownLayout)] 11 | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro 12 = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) 13help: consider restricting type parameter `T` 14 | 1559 | fn test_kl13<T: zerocopy::KnownLayout>(t: T) -> impl KnownLayout { 16 | +++++++++++++++++++++++ 17 18error[E0277]: the size for values of type `T` cannot be known at compilation time 19 --> tests/ui-stable/mid_compile_pass.rs:31:15 20 | 2130 | fn test_kl04<T: ?Sized>(kl: &KL04<T>) { 22 | - this type parameter needs to be `Sized` 2331 | assert_kl(kl); 24 | --------- ^^ doesn't have a size known at compile-time 25 | | 26 | required by a bound introduced by this call 27 | 28note: required because it appears within the type `KL04<T>` 29 --> tests/ui-stable/mid_compile_pass.rs:28:8 30 | 3128 | struct KL04<T: ?Sized>(u8, T); 32 | ^^^^ 33note: required for `KL04<T>` to implement `KnownLayout` 34 --> tests/ui-stable/mid_compile_pass.rs:27:10 35 | 3627 | #[derive(KnownLayout)] 37 | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro 38note: required by a bound in `assert_kl` 39 --> tests/ui-stable/mid_compile_pass.rs:23:26 40 | 4123 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} 42 | ^^^^^^^^^^^ required by this bound in `assert_kl` 43 = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) 44help: consider removing the `?Sized` bound to make the type parameter `Sized` 45 | 4630 - fn test_kl04<T: ?Sized>(kl: &KL04<T>) { 4730 + fn test_kl04<T>(kl: &KL04<T>) { 48 | 49 50error[E0277]: the size for values of type `T` cannot be known at compilation time 51 --> tests/ui-stable/mid_compile_pass.rs:40:15 52 | 5339 | fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { 54 | - this type parameter needs to be `Sized` 5540 | assert_kl(kl); 56 | --------- ^^ doesn't have a size known at compile-time 57 | | 58 | required by a bound introduced by this call 59 | 60note: required because it appears within the type `KL06<T>` 61 --> tests/ui-stable/mid_compile_pass.rs:37:8 62 | 6337 | struct KL06<T: ?Sized + KnownLayout>(u8, T); 64 | ^^^^ 65note: required for `KL06<T>` to implement `KnownLayout` 66 --> tests/ui-stable/mid_compile_pass.rs:36:10 67 | 6836 | #[derive(KnownLayout)] 69 | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro 70note: required by a bound in `assert_kl` 71 --> tests/ui-stable/mid_compile_pass.rs:23:26 72 | 7323 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} 74 | ^^^^^^^^^^^ required by this bound in `assert_kl` 75 = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) 76help: consider removing the `?Sized` bound to make the type parameter `Sized` 77 | 7839 - fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { 7939 + fn test_kl06<T: KnownLayout>(kl: &KL06<T>) { 80 | 81 82error[E0277]: the trait bound `T: KnownLayout` is not satisfied 83 --> tests/ui-stable/mid_compile_pass.rs:50:15 84 | 8550 | assert_kl(kl) 86 | --------- ^^ the trait `KnownLayout` is not implemented for `T`, which is required by `KL12<T>: KnownLayout` 87 | | 88 | required by a bound introduced by this call 89 | 90note: required for `KL12<T>` to implement `KnownLayout` 91 --> tests/ui-stable/mid_compile_pass.rs:45:10 92 | 9345 | #[derive(KnownLayout)] 94 | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro 95note: required by a bound in `assert_kl` 96 --> tests/ui-stable/mid_compile_pass.rs:23:26 97 | 9823 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} 99 | ^^^^^^^^^^^ required by this bound in `assert_kl` 100 = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) 101help: consider further restricting this bound 102 | 10349 | fn test_kl12<T: ?Sized + zerocopy::KnownLayout>(kl: &KL12<T>) { 104 | +++++++++++++++++++++++ 105