Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

14 files changed, 481 insertions, 0 deletions

diff --git a/src/test/ui/transmutability/unions/boolish.rs b/src/test/ui/transmutability/unions/boolish.rs
new file mode 100644
index 000000000..975118b99
--- /dev/null
+++ b/src/test/ui/transmutability/unions/boolish.rs
@@ -0,0 +1,31 @@
+// check-pass
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![feature(marker_trait_attr)]
+#![allow(dead_code)]
+#![allow(incomplete_features)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+    {}
+}
+
+fn should_match_bool() {
+    #[derive(Copy, Clone)] #[repr(u8)] pub enum False { V = 0 }
+    #[derive(Copy, Clone)] #[repr(u8)] pub enum True { V = 1 }
+
+    #[repr(C)]
+    pub union Bool {
+        pub f: False,
+        pub t: True,
+    }
+
+    assert::is_transmutable::<Bool, bool>();
+    assert::is_transmutable::<bool, Bool>();
+}
diff --git a/src/test/ui/transmutability/unions/repr/should_handle_align.rs b/src/test/ui/transmutability/unions/repr/should_handle_align.rs
new file mode 100644
index 000000000..e215799a2
--- /dev/null
+++ b/src/test/ui/transmutability/unions/repr/should_handle_align.rs
@@ -0,0 +1,40 @@
+// check-pass
+//! The presence of an `align(X)` annotation must be accounted for.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+    {}
+}
+
+fn should_pad_explicitly_aligned_field() {
+    #[derive(Clone, Copy)] #[repr(u8)] enum V0u8 { V = 0 }
+    #[derive(Clone, Copy)] #[repr(u8)] enum V1u8 { V = 1 }
+
+    #[repr(C)]
+    pub union Uninit {
+        a: (),
+        b: V1u8,
+    }
+
+    #[repr(C, align(2))]
+    pub union align_2 {
+        a: V0u8,
+    }
+
+    #[repr(C)] struct ImplicitlyPadded(align_2, V0u8);
+    #[repr(C)] struct ExplicitlyPadded(V0u8, Uninit, V0u8);
+
+    // An implementation that (incorrectly) does not place a padding byte after
+    // `align_2` will, incorrectly, reject the following transmutations.
+    assert::is_maybe_transmutable::<ImplicitlyPadded, ExplicitlyPadded>();
+    assert::is_maybe_transmutable::<ExplicitlyPadded, ImplicitlyPadded>();
+}
diff --git a/src/test/ui/transmutability/unions/repr/should_handle_packed.rs b/src/test/ui/transmutability/unions/repr/should_handle_packed.rs
new file mode 100644
index 000000000..34a53c7a8
--- /dev/null
+++ b/src/test/ui/transmutability/unions/repr/should_handle_packed.rs
@@ -0,0 +1,41 @@
+// check-pass
+//! The presence of an `align(X)` annotation must be accounted for.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+    {}
+}
+
+fn should_pad_explicitly_packed_field() {
+    #[derive(Clone, Copy)] #[repr(u8)] enum V0u8 { V = 0 }
+    #[derive(Clone, Copy)] #[repr(u8)] enum V1u8 { V = 1 }
+    #[derive(Clone, Copy)] #[repr(u8)] enum V2u8 { V = 2 }
+    #[derive(Clone, Copy)] #[repr(u32)] enum V3u32 { V = 3 }
+
+    #[repr(C)]
+    pub union Uninit {
+        a: (),
+        b: V1u8,
+    }
+
+    #[repr(C, packed(2))]
+    pub union Packed {
+        a: [V3u32; 0],
+        b: V0u8,
+    }
+
+    #[repr(C)] struct ImplicitlyPadded(Packed, V2u8);
+    #[repr(C)] struct ExplicitlyPadded(V0u8, Uninit, V2u8);
+
+    assert::is_maybe_transmutable::<ImplicitlyPadded, ExplicitlyPadded>();
+    assert::is_maybe_transmutable::<ExplicitlyPadded, ImplicitlyPadded>();
+}
diff --git a/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.rs b/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.rs
new file mode 100644
index 000000000..cec8e389f
--- /dev/null
+++ b/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.rs
@@ -0,0 +1,37 @@
+//! A struct must have a well-defined layout to participate in a transmutation.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+    {}
+}
+
+fn should_reject_repr_rust()
+{
+    union repr_rust {
+        a: u8
+    }
+
+    assert::is_maybe_transmutable::<repr_rust, ()>(); //~ ERROR cannot be safely transmuted
+    assert::is_maybe_transmutable::<u128, repr_rust>(); //~ ERROR cannot be safely transmuted
+}
+
+fn should_accept_repr_C()
+{
+    #[repr(C)]
+    union repr_c {
+        a: u8
+    }
+
+    struct repr_rust;
+    assert::is_maybe_transmutable::<repr_c, ()>();
+    assert::is_maybe_transmutable::<u128, repr_c>();
+}
diff --git a/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.stderr b/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.stderr
new file mode 100644
index 000000000..2ed01b159
--- /dev/null
+++ b/src/test/ui/transmutability/unions/repr/should_require_well_defined_layout.stderr
@@ -0,0 +1,35 @@
+error[E0277]: `should_reject_repr_rust::repr_rust` cannot be safely transmuted into `()` in the defining scope of `assert::Context`.
+  --> $DIR/should_require_well_defined_layout.rs:23:48
+   |
+LL |     assert::is_maybe_transmutable::<repr_rust, ()>();
+   |                                                ^^ `should_reject_repr_rust::repr_rust` cannot be safely transmuted into `()` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<should_reject_repr_rust::repr_rust, assert::Context, true, true, true, true>` is not implemented for `()`
+note: required by a bound in `is_maybe_transmutable`
+  --> $DIR/should_require_well_defined_layout.rs:13:14
+   |
+LL |     pub fn is_maybe_transmutable<Src, Dst>()
+   |            --------------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
+
+error[E0277]: `u128` cannot be safely transmuted into `should_reject_repr_rust::repr_rust` in the defining scope of `assert::Context`.
+  --> $DIR/should_require_well_defined_layout.rs:24:43
+   |
+LL |     assert::is_maybe_transmutable::<u128, repr_rust>();
+   |                                           ^^^^^^^^^ `u128` cannot be safely transmuted into `should_reject_repr_rust::repr_rust` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<u128, assert::Context, true, true, true, true>` is not implemented for `should_reject_repr_rust::repr_rust`
+note: required by a bound in `is_maybe_transmutable`
+  --> $DIR/should_require_well_defined_layout.rs:13:14
+   |
+LL |     pub fn is_maybe_transmutable<Src, Dst>()
+   |            --------------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/transmutability/unions/should_pad_variants.rs b/src/test/ui/transmutability/unions/should_pad_variants.rs
new file mode 100644
index 000000000..c4757900f
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_pad_variants.rs
@@ -0,0 +1,40 @@
+//! The variants of a union must be padded with uninit bytes such that they have
+//! the same length (in bytes).
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+
+    pub fn is_transmutable<Src, Dst, Context>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+    {}
+}
+
+#[derive(Clone, Copy)]
+#[repr(C)] struct Zst;
+
+#[derive(Clone, Copy)]
+#[repr(u8)] enum V0 { V = 0 }
+
+#[derive(Clone, Copy)]
+#[repr(u8)] enum V2 { V = 2 }
+
+#[repr(C)]
+union Lopsided {
+    smol: Zst,
+    lorg: V0,
+}
+
+#[repr(C)] struct Src(V0, Zst, V2);
+#[repr(C)] struct Dst(V0, Lopsided, V2);
+
+fn should_pad_variants() {
+    struct Context;
+    // If the implementation (incorrectly) fails to pad `Lopsided::smol` with
+    // an uninitialized byte, this transmutation might be (wrongly) accepted:
+    assert::is_transmutable::<Src, Dst, Context>(); //~ ERROR cannot be safely transmuted
+}
diff --git a/src/test/ui/transmutability/unions/should_pad_variants.stderr b/src/test/ui/transmutability/unions/should_pad_variants.stderr
new file mode 100644
index 000000000..429f7211d
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_pad_variants.stderr
@@ -0,0 +1,19 @@
+error[E0277]: `Src` cannot be safely transmuted into `Dst` in the defining scope of `should_pad_variants::Context`.
+  --> $DIR/should_pad_variants.rs:39:36
+   |
+LL |     assert::is_transmutable::<Src, Dst, Context>();
+   |                                    ^^^ `Src` cannot be safely transmuted into `Dst` in the defining scope of `should_pad_variants::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<Src, should_pad_variants::Context, true, true, true, true>` is not implemented for `Dst`
+note: required by a bound in `is_transmutable`
+  --> $DIR/should_pad_variants.rs:13:14
+   |
+LL |     pub fn is_transmutable<Src, Dst, Context>()
+   |            --------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, true, true, true, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/transmutability/unions/should_permit_intersecting_if_validity_is_assumed.rs b/src/test/ui/transmutability/unions/should_permit_intersecting_if_validity_is_assumed.rs
new file mode 100644
index 000000000..2493d7155
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_permit_intersecting_if_validity_is_assumed.rs
@@ -0,0 +1,39 @@
+// check-pass
+//! If validity is assumed, there need only be one matching bit-pattern between
+//! the source and destination types.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, false, false, true, true>
+        // validity IS assumed --------------------------------^^^^
+    {}
+}
+
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox00 { V = 0x00 }
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox7F { V = 0x7F }
+#[derive(Clone, Copy)] #[repr(u8)] enum OxFF { V = 0xFF }
+
+fn test() {
+    #[repr(C)]
+    union A {
+        a: Ox00,
+        b: Ox7F,
+    }
+
+    #[repr(C)]
+    union B {
+        a: Ox7F,
+        b: OxFF,
+    }
+
+    assert::is_maybe_transmutable::<A, B>();
+    assert::is_maybe_transmutable::<B, A>();
+}
diff --git a/src/test/ui/transmutability/unions/should_reject_contraction.rs b/src/test/ui/transmutability/unions/should_reject_contraction.rs
new file mode 100644
index 000000000..e8138d0e0
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_contraction.rs
@@ -0,0 +1,36 @@
+//! Validity may not be contracted, unless validity is assumed.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+    {}
+}
+
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox00 { V = 0x00 }
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox01 { V = 0x01 }
+#[derive(Clone, Copy)] #[repr(u8)] enum OxFF { V = 0xFF }
+
+fn test() {
+    #[repr(C)]
+    union Subset {
+        a: Ox00,
+        b: OxFF,
+    }
+
+    #[repr(C)]
+    union Superset {
+        a: Ox00,
+        b: OxFF,
+        c: Ox01,
+    }
+
+    assert::is_transmutable::<Superset, Subset>(); //~ ERROR cannot be safely transmuted
+}
diff --git a/src/test/ui/transmutability/unions/should_reject_contraction.stderr b/src/test/ui/transmutability/unions/should_reject_contraction.stderr
new file mode 100644
index 000000000..99f589008
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_contraction.stderr
@@ -0,0 +1,19 @@
+error[E0277]: `Superset` cannot be safely transmuted into `Subset` in the defining scope of `assert::Context`.
+  --> $DIR/should_reject_contraction.rs:35:41
+   |
+LL |     assert::is_transmutable::<Superset, Subset>();
+   |                                         ^^^^^^ `Superset` cannot be safely transmuted into `Subset` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<Superset, assert::Context, false, false, false, true>` is not implemented for `Subset`
+note: required by a bound in `is_transmutable`
+  --> $DIR/should_reject_contraction.rs:13:14
+   |
+LL |     pub fn is_transmutable<Src, Dst>()
+   |            --------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/transmutability/unions/should_reject_disjoint.rs b/src/test/ui/transmutability/unions/should_reject_disjoint.rs
new file mode 100644
index 000000000..16160e29a
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_disjoint.rs
@@ -0,0 +1,36 @@
+//! Validity must be satisfiable, even if validity is assumed.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, false, false, true, true>
+        // validity IS assumed --------------------------------^^^^
+    {}
+}
+
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox00 { V = 0x00 }
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox01 { V = 0x01 }
+#[derive(Clone, Copy)] #[repr(u8)] enum OxFF { V = 0xFF }
+
+fn test() {
+    #[repr(C)]
+    union A {
+        a: Ox00,
+        b: OxFF,
+    }
+
+    #[repr(C)]
+    union B {
+        c: Ox01,
+    }
+
+    assert::is_maybe_transmutable::<A, B>(); //~ ERROR cannot be safely transmuted
+    assert::is_maybe_transmutable::<B, A>(); //~ ERROR cannot be safely transmuted
+}
diff --git a/src/test/ui/transmutability/unions/should_reject_disjoint.stderr b/src/test/ui/transmutability/unions/should_reject_disjoint.stderr
new file mode 100644
index 000000000..5714e2bf3
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_disjoint.stderr
@@ -0,0 +1,35 @@
+error[E0277]: `A` cannot be safely transmuted into `B` in the defining scope of `assert::Context`.
+  --> $DIR/should_reject_disjoint.rs:34:40
+   |
+LL |     assert::is_maybe_transmutable::<A, B>();
+   |                                        ^ `A` cannot be safely transmuted into `B` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<A, assert::Context, false, false, true, true>` is not implemented for `B`
+note: required by a bound in `is_maybe_transmutable`
+  --> $DIR/should_reject_disjoint.rs:13:14
+   |
+LL |     pub fn is_maybe_transmutable<Src, Dst>()
+   |            --------------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, false, false, true, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
+
+error[E0277]: `B` cannot be safely transmuted into `A` in the defining scope of `assert::Context`.
+  --> $DIR/should_reject_disjoint.rs:35:40
+   |
+LL |     assert::is_maybe_transmutable::<B, A>();
+   |                                        ^ `B` cannot be safely transmuted into `A` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<B, assert::Context, false, false, true, true>` is not implemented for `A`
+note: required by a bound in `is_maybe_transmutable`
+  --> $DIR/should_reject_disjoint.rs:13:14
+   |
+LL |     pub fn is_maybe_transmutable<Src, Dst>()
+   |            --------------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, false, false, true, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/transmutability/unions/should_reject_intersecting.rs b/src/test/ui/transmutability/unions/should_reject_intersecting.rs
new file mode 100644
index 000000000..58e399fb9
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_intersecting.rs
@@ -0,0 +1,38 @@
+//! ALL valid bit patterns of the source must be valid bit patterns of the
+//! destination type, unless validity is assumed.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::BikeshedIntrinsicFrom;
+    pub struct Context;
+
+    pub fn is_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+        // validity is NOT assumed ----------------------------^^^^^
+    {}
+}
+
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox00 { V = 0x00 }
+#[derive(Clone, Copy)] #[repr(u8)] enum Ox7F { V = 0x7F }
+#[derive(Clone, Copy)] #[repr(u8)] enum OxFF { V = 0xFF }
+
+fn test() {
+    #[repr(C)]
+    union A {
+        a: Ox00,
+        b: Ox7F,
+    }
+
+    #[repr(C)]
+    union B {
+        a: Ox7F,
+        b: OxFF,
+    }
+
+    assert::is_transmutable::<A, B>(); //~ ERROR cannot be safely transmuted
+    assert::is_transmutable::<B, A>(); //~ ERROR cannot be safely transmuted
+}
diff --git a/src/test/ui/transmutability/unions/should_reject_intersecting.stderr b/src/test/ui/transmutability/unions/should_reject_intersecting.stderr
new file mode 100644
index 000000000..92689a5f8
--- /dev/null
+++ b/src/test/ui/transmutability/unions/should_reject_intersecting.stderr
@@ -0,0 +1,35 @@
+error[E0277]: `A` cannot be safely transmuted into `B` in the defining scope of `assert::Context`.
+  --> $DIR/should_reject_intersecting.rs:36:34
+   |
+LL |     assert::is_transmutable::<A, B>();
+   |                                  ^ `A` cannot be safely transmuted into `B` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<A, assert::Context, false, false, false, true>` is not implemented for `B`
+note: required by a bound in `is_transmutable`
+  --> $DIR/should_reject_intersecting.rs:14:14
+   |
+LL |     pub fn is_transmutable<Src, Dst>()
+   |            --------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable`
+
+error[E0277]: `B` cannot be safely transmuted into `A` in the defining scope of `assert::Context`.
+  --> $DIR/should_reject_intersecting.rs:37:34
+   |
+LL |     assert::is_transmutable::<B, A>();
+   |                                  ^ `B` cannot be safely transmuted into `A` in the defining scope of `assert::Context`.
+   |
+   = help: the trait `BikeshedIntrinsicFrom<B, assert::Context, false, false, false, true>` is not implemented for `A`
+note: required by a bound in `is_transmutable`
+  --> $DIR/should_reject_intersecting.rs:14:14
+   |
+LL |     pub fn is_transmutable<Src, Dst>()
+   |            --------------- required by a bound in this
+LL |     where
+LL |         Dst: BikeshedIntrinsicFrom<Src, Context, false, false, false, true>
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.