1 files changed, 25 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-24947.rs b/src/test/ui/issues/issue-24947.rs
new file mode 100644
index 000000000..23705b4c9
--- /dev/null
+++ b/src/test/ui/issues/issue-24947.rs
@@ -0,0 +1,25 @@
+// run-pass
+// #24947 ICE using a trait-associated const in an array size
+
+
+struct Foo;
+
+impl Foo {
+    const SIZE: usize = 8;
+}
+
+trait Bar {
+    const BAR_SIZE: usize;
+}
+
+impl Bar for Foo {
+    const BAR_SIZE: usize = 12;
+}
+
+#[allow(unused_variables)]
+fn main() {
+    let w: [u8; 12] = [0u8; <Foo as Bar>::BAR_SIZE];
+    let x: [u8; 12] = [0u8; <Foo>::BAR_SIZE];
+    let y: [u8; 8] = [0u8; <Foo>::SIZE];
+    let z: [u8; 8] = [0u8; Foo::SIZE];
+}