1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/issue-100217.rs b/src/test/ui/const-generics/generic_const_exprs/issue-100217.rs
new file mode 100644
index 000000000..acdc348a3
--- /dev/null
+++ b/src/test/ui/const-generics/generic_const_exprs/issue-100217.rs
@@ -0,0 +1,42 @@
+// build-pass
+
+#![allow(incomplete_features)]
+#![feature(generic_const_exprs)]
+
+trait TraitOne {
+    const MY_NUM: usize;
+    type MyErr: std::fmt::Debug;
+
+    fn do_one_stuff(arr: [u8; Self::MY_NUM]) -> Result<(), Self::MyErr>;
+}
+
+trait TraitTwo {
+    fn do_two_stuff();
+}
+
+impl<O: TraitOne> TraitTwo for O
+where
+    [(); Self::MY_NUM]:,
+{
+    fn do_two_stuff() {
+        O::do_one_stuff([5; Self::MY_NUM]).unwrap()
+    }
+}
+
+struct Blargotron;
+
+#[derive(Debug)]
+struct ErrTy<const N: usize>([(); N]);
+
+impl TraitOne for Blargotron {
+    const MY_NUM: usize = 3;
+    type MyErr = ErrTy<{ Self::MY_NUM }>;
+
+    fn do_one_stuff(_arr: [u8; Self::MY_NUM]) -> Result<(), Self::MyErr> {
+        Ok(())
+    }
+}
+
+fn main() {
+    Blargotron::do_two_stuff();
+}