1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/types-mismatch-const-args.rs b/src/test/ui/const-generics/types-mismatch-const-args.rs
new file mode 100644
index 000000000..43ef28b26
--- /dev/null
+++ b/src/test/ui/const-generics/types-mismatch-const-args.rs
@@ -0,0 +1,22 @@
+// revisions: full min
+#![cfg_attr(full, feature(generic_const_exprs))]
+#![cfg_attr(full, allow(incomplete_features))]
+
+// tests the diagnostic output of type mismatches for types that have const generics arguments.
+
+use std::marker::PhantomData;
+
+struct A<'a, T, const X: u32, const Y: u32> {
+    data: PhantomData<&'a T>
+}
+
+fn a<'a, 'b>() {
+    let _: A<'a, u32, {2u32}, {3u32}> = A::<'a, u32, {2u32 + 2u32}, {3u32}> { data: PhantomData };
+    //~^ ERROR mismatched types
+    let _: A<'a, u16, {2u32}, {3u32}> = A::<'b, u32, {2u32}, {3u32}> { data: PhantomData };
+    //~^ ERROR mismatched types
+    let _: A<'a, u16, {4u32}, {3u32}> = A::<'b, u32, {2u32}, {3u32}> { data: PhantomData };
+    //~^ ERROR mismatched types
+}
+
+pub fn main() {}