1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/ui/transmute/transmute-type-parameters.rs b/src/test/ui/transmute/transmute-type-parameters.rs
new file mode 100644
index 000000000..5f44b2d0f
--- /dev/null
+++ b/src/test/ui/transmute/transmute-type-parameters.rs
@@ -0,0 +1,44 @@
+// Tests that `transmute` cannot be called on type parameters.
+
+use std::mem::transmute;
+
+unsafe fn f<T>(x: T) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+unsafe fn g<T>(x: (T, i32)) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+unsafe fn h<T>(x: [T; 10]) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+struct Bad<T> {
+    f: T,
+}
+
+unsafe fn i<T>(x: Bad<T>) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+enum Worse<T> {
+    A(T),
+    B,
+}
+
+unsafe fn j<T>(x: Worse<T>) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+unsafe fn k<T>(x: Option<T>) {
+    let _: i32 = transmute(x);
+//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
+}
+
+fn main() {}