Rehome tests/ui/issues/ tests [1/?]

2 files changed, 25 insertions, 0 deletions

diff --git a/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.rs b/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.rs
new file mode 100644
index 00000000000..22cb379ffda
--- /dev/null
+++ b/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.rs
@@ -0,0 +1,13 @@
+trait Trait<'a> {
+    type A;
+    type B;
+}
+
+fn foo<'a, T: Trait<'a>>(value: T::A) {
+    let new: T::B = unsafe { std::mem::transmute(value) };
+//~^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
+}
+
+fn main() { }
+
+// https://github.com/rust-lang/rust/issues/21174
diff --git a/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.stderr b/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.stderr
new file mode 100644
index 00000000000..5c0cd91cee1
--- /dev/null
+++ b/tests/ui/transmutability/transmute-between-associated-types-with-lifetimers-21174.stderr
@@ -0,0 +1,12 @@
+error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
+  --> $DIR/transmute-between-associated-types-with-lifetimers-21174.rs:7:30
+   |
+LL |     let new: T::B = unsafe { std::mem::transmute(value) };
+   |                              ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: source type: `<T as Trait<'_>>::A` (this type does not have a fixed size)
+   = note: target type: `<T as Trait<'_>>::B` (this type does not have a fixed size)
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0512`.