mirror of
https://github.com/rust-lang/rust.git
synced 2026-04-27 18:57:42 +03:00
Scott McMurray
ba1a33e105
Currently we pick "weird" numbers like `1114112` for `None::<char>`. While that's not *wrong*, it's kinda *unnatural* -- a human wouldn't make that choice. This PR instead picks `-1` for thinge like `None::<char>` -- like clang's `WEOF` -- and `None::<bool>` and such. Any enums with more than one niched value (so not `Result` nor `Option`) remain as they were before.
860 lines
25 KiB
Plaintext
860 lines
25 KiB
Plaintext
error: unions cannot have zero fields
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--> $DIR/debug.rs:84:1
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LL | union EmptyUnion {}
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| ^^^^^^^^^^^^^^^^^^^
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error: `#[rustc_dump_layout]` attribute cannot be used on constants
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--> $DIR/debug.rs:71:1
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LL | #[rustc_dump_layout(debug)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: `#[rustc_dump_layout]` can be applied to data types and type aliases
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error: `#[rustc_dump_layout]` attribute cannot be used on associated consts
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--> $DIR/debug.rs:75:5
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LL | #[rustc_dump_layout(debug)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: `#[rustc_dump_layout]` can be applied to data types and type aliases
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error: layout_of(E) = Layout {
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size: Size(12 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Arbitrary {
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offsets: [
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Size(0 bytes),
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],
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in_memory_order: [
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0,
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],
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},
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largest_niche: Some(
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Niche {
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offset: Size(0 bytes),
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=0,
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},
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),
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uninhabited: false,
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variants: Multiple {
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tag: Initialized {
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=0,
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},
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tag_encoding: Direct,
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tag_field: 0,
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variants: [
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Layout {
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size: Size(4 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Arbitrary {
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offsets: [],
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in_memory_order: [],
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},
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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},
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Layout {
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size: Size(12 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Arbitrary {
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offsets: [
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Size(4 bytes),
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Size(4 bytes),
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Size(8 bytes),
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],
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in_memory_order: [
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0,
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1,
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2,
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],
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},
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largest_niche: None,
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uninhabited: true,
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variants: Single {
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index: 1,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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},
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],
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:8:1
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LL | enum E { Foo, Bar(!, i32, i32) }
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| ^^^^^^
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error: layout_of(S) = Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: ScalarPair(
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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),
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fields: Arbitrary {
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offsets: [
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Size(0 bytes),
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Size(8 bytes),
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Size(4 bytes),
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],
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in_memory_order: [
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0,
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2,
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1,
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],
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},
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:11:1
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LL | struct S { f1: i32, f2: (), f3: i32 }
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| ^^^^^^^^
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error: layout_of(U) = Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:14:1
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LL | union U { f1: (i32, i32), f3: i32 }
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| ^^^^^^^
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error: layout_of(Result<i32, i32>) = Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: ScalarPair(
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Initialized {
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=1,
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},
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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),
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fields: Arbitrary {
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offsets: [
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Size(0 bytes),
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],
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in_memory_order: [
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0,
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],
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},
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largest_niche: Some(
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Niche {
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offset: Size(0 bytes),
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=1,
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},
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),
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uninhabited: false,
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variants: Multiple {
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tag: Initialized {
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=1,
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},
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tag_encoding: Direct,
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tag_field: 0,
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variants: [
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Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: ScalarPair(
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Initialized {
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=1,
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},
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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),
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fields: Arbitrary {
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offsets: [
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Size(4 bytes),
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],
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in_memory_order: [
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0,
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],
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},
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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},
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Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: ScalarPair(
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Initialized {
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value: Int(
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I32,
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false,
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),
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valid_range: 0..=1,
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},
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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),
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fields: Arbitrary {
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offsets: [
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Size(4 bytes),
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],
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in_memory_order: [
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0,
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],
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},
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 1,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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},
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],
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:17:1
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LL | type Test = Result<i32, i32>;
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| ^^^^^^^^^
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error: layout_of(i32) = Layout {
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size: Size(4 bytes),
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align: AbiAlign {
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abi: Align(4 bytes),
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},
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backend_repr: Scalar(
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Initialized {
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value: Int(
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I32,
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true,
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),
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valid_range: 0..=4294967295,
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},
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),
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fields: Primitive,
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(4 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:20:1
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LL | type T = impl std::fmt::Debug;
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| ^^^^^^
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error: layout_of(V) = Layout {
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size: Size(2 bytes),
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align: AbiAlign {
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abi: Align(2 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(2 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:27:1
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LL | pub union V {
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| ^^^^^^^^^^^
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error: layout_of(W) = Layout {
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size: Size(2 bytes),
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align: AbiAlign {
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abi: Align(2 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(2 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:33:1
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LL | pub union W {
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| ^^^^^^^^^^^
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error: layout_of(Y) = Layout {
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size: Size(0 bytes),
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align: AbiAlign {
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abi: Align(2 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(2 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:39:1
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LL | pub union Y {
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| ^^^^^^^^^^^
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error: layout_of(P1) = Layout {
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size: Size(4 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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1,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:46:1
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LL | union P1 { x: u32 }
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| ^^^^^^^^
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error: layout_of(P2) = Layout {
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size: Size(8 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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1,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:50:1
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LL | union P2 { x: (u32, u32) }
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| ^^^^^^^^
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error: layout_of(P3) = Layout {
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size: Size(16 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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1,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:58:1
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LL | union P3 { x: F32x4 }
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| ^^^^^^^^
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error: layout_of(P4) = Layout {
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size: Size(12 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Memory {
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sized: true,
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},
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fields: Union(
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1,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:62:1
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LL | union P4 { x: E }
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| ^^^^^^^^
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error: layout_of(P5) = Layout {
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size: Size(1 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Scalar(
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Union {
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value: Int(
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I8,
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false,
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),
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},
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),
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:66:1
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LL | union P5 { zst: [u16; 0], byte: u8 }
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| ^^^^^^^^
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error: layout_of(MaybeUninit<u8>) = Layout {
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size: Size(1 bytes),
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align: AbiAlign {
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abi: Align(1 bytes),
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},
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backend_repr: Scalar(
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Union {
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value: Int(
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I8,
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false,
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),
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},
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),
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fields: Union(
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2,
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),
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largest_niche: None,
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uninhabited: false,
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variants: Single {
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index: 0,
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},
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max_repr_align: None,
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unadjusted_abi_align: Align(1 bytes),
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randomization_seed: $SEED,
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}
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--> $DIR/debug.rs:69:1
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LL | type X = std::mem::MaybeUninit<u8>;
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| ^^^^^^
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error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/debug.rs:80:19
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LL | type Impossible = (str, str);
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| ^^^^^^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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= note: only the last element of a tuple may have a dynamically sized type
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error: the type has an unknown layout
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--> $DIR/debug.rs:84:1
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|
LL | union EmptyUnion {}
|
|
| ^^^^^^^^^^^^^^^^
|
|
|
|
error: the type `T` does not have a fixed layout
|
|
--> $DIR/debug.rs:90:1
|
|
|
|
|
LL | type TooGeneric<T> = T;
|
|
| ^^^^^^^^^^^^^^^^^^
|
|
|
|
error: layout_of(Option<bool>) = Layout {
|
|
size: Size(1 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(1 bytes),
|
|
},
|
|
backend_repr: Scalar(
|
|
Initialized {
|
|
value: Int(
|
|
I8,
|
|
false,
|
|
),
|
|
valid_range: 0..=2,
|
|
},
|
|
),
|
|
fields: Arbitrary {
|
|
offsets: [
|
|
Size(0 bytes),
|
|
],
|
|
in_memory_order: [
|
|
0,
|
|
],
|
|
},
|
|
largest_niche: Some(
|
|
Niche {
|
|
offset: Size(0 bytes),
|
|
value: Int(
|
|
I8,
|
|
false,
|
|
),
|
|
valid_range: 0..=2,
|
|
},
|
|
),
|
|
uninhabited: false,
|
|
variants: Multiple {
|
|
tag: Initialized {
|
|
value: Int(
|
|
I8,
|
|
false,
|
|
),
|
|
valid_range: 0..=2,
|
|
},
|
|
tag_encoding: Niche {
|
|
untagged_variant: 1,
|
|
niche_variants: 0..=0,
|
|
niche_start: 2,
|
|
},
|
|
tag_field: 0,
|
|
variants: [
|
|
Layout {
|
|
size: Size(0 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(1 bytes),
|
|
},
|
|
backend_repr: Memory {
|
|
sized: true,
|
|
},
|
|
fields: Arbitrary {
|
|
offsets: [],
|
|
in_memory_order: [],
|
|
},
|
|
largest_niche: None,
|
|
uninhabited: false,
|
|
variants: Single {
|
|
index: 0,
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(1 bytes),
|
|
randomization_seed: $SEED,
|
|
},
|
|
Layout {
|
|
size: Size(1 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(1 bytes),
|
|
},
|
|
backend_repr: Scalar(
|
|
Initialized {
|
|
value: Int(
|
|
I8,
|
|
false,
|
|
),
|
|
valid_range: 0..=1,
|
|
},
|
|
),
|
|
fields: Arbitrary {
|
|
offsets: [
|
|
Size(0 bytes),
|
|
],
|
|
in_memory_order: [
|
|
0,
|
|
],
|
|
},
|
|
largest_niche: Some(
|
|
Niche {
|
|
offset: Size(0 bytes),
|
|
value: Int(
|
|
I8,
|
|
false,
|
|
),
|
|
valid_range: 0..=1,
|
|
},
|
|
),
|
|
uninhabited: false,
|
|
variants: Single {
|
|
index: 1,
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(1 bytes),
|
|
randomization_seed: $SEED,
|
|
},
|
|
],
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(1 bytes),
|
|
randomization_seed: $SEED,
|
|
}
|
|
--> $DIR/debug.rs:93:1
|
|
|
|
|
LL | type OptBool = Option<bool>;
|
|
| ^^^^^^^^^^^^
|
|
|
|
error: layout_of(Option<char>) = Layout {
|
|
size: Size(4 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(4 bytes),
|
|
},
|
|
backend_repr: Scalar(
|
|
Initialized {
|
|
value: Int(
|
|
I32,
|
|
false,
|
|
),
|
|
valid_range: (..=1114111) | (4294967295..),
|
|
},
|
|
),
|
|
fields: Arbitrary {
|
|
offsets: [
|
|
Size(0 bytes),
|
|
],
|
|
in_memory_order: [
|
|
0,
|
|
],
|
|
},
|
|
largest_niche: Some(
|
|
Niche {
|
|
offset: Size(0 bytes),
|
|
value: Int(
|
|
I32,
|
|
false,
|
|
),
|
|
valid_range: (..=1114111) | (4294967295..),
|
|
},
|
|
),
|
|
uninhabited: false,
|
|
variants: Multiple {
|
|
tag: Initialized {
|
|
value: Int(
|
|
I32,
|
|
false,
|
|
),
|
|
valid_range: (..=1114111) | (4294967295..),
|
|
},
|
|
tag_encoding: Niche {
|
|
untagged_variant: 1,
|
|
niche_variants: 0..=0,
|
|
niche_start: 4294967295,
|
|
},
|
|
tag_field: 0,
|
|
variants: [
|
|
Layout {
|
|
size: Size(0 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(1 bytes),
|
|
},
|
|
backend_repr: Memory {
|
|
sized: true,
|
|
},
|
|
fields: Arbitrary {
|
|
offsets: [],
|
|
in_memory_order: [],
|
|
},
|
|
largest_niche: None,
|
|
uninhabited: false,
|
|
variants: Single {
|
|
index: 0,
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(1 bytes),
|
|
randomization_seed: $SEED,
|
|
},
|
|
Layout {
|
|
size: Size(4 bytes),
|
|
align: AbiAlign {
|
|
abi: Align(4 bytes),
|
|
},
|
|
backend_repr: Scalar(
|
|
Initialized {
|
|
value: Int(
|
|
I32,
|
|
false,
|
|
),
|
|
valid_range: 0..=1114111,
|
|
},
|
|
),
|
|
fields: Arbitrary {
|
|
offsets: [
|
|
Size(0 bytes),
|
|
],
|
|
in_memory_order: [
|
|
0,
|
|
],
|
|
},
|
|
largest_niche: Some(
|
|
Niche {
|
|
offset: Size(0 bytes),
|
|
value: Int(
|
|
I32,
|
|
false,
|
|
),
|
|
valid_range: 0..=1114111,
|
|
},
|
|
),
|
|
uninhabited: false,
|
|
variants: Single {
|
|
index: 1,
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(4 bytes),
|
|
randomization_seed: $SEED,
|
|
},
|
|
],
|
|
},
|
|
max_repr_align: None,
|
|
unadjusted_abi_align: Align(4 bytes),
|
|
randomization_seed: $SEED,
|
|
}
|
|
--> $DIR/debug.rs:96:1
|
|
|
|
|
LL | type OptChar = Option<char>;
|
|
| ^^^^^^^^^^^^
|
|
|
|
error: aborting due to 22 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|