From c2a1dfacb41aee0da05bf4fa7e07dbbc24fc861f Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Sun, 22 Nov 2020 14:53:31 +0100
Subject: [PATCH] Add regression test for issue 73899

Adds regression test for https://github.com/rust-lang/rust/issues/73899
---
 src/test/ui/issues/issue-73899.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/test/ui/issues/issue-73899.rs

diff --git a/src/test/ui/issues/issue-73899.rs b/src/test/ui/issues/issue-73899.rs
new file mode 100644
index 0000000000000..2a3a5ab2a3bb0
--- /dev/null
+++ b/src/test/ui/issues/issue-73899.rs
@@ -0,0 +1,21 @@
+// run-pass
+#![feature(const_evaluatable_checked)]
+#![feature(const_generics)]
+#![allow(incomplete_features)]
+
+trait Foo {}
+
+impl<const N: usize> Foo for [(); N] where Self: FooImpl<{ N == 0 }> {}
+
+trait FooImpl<const IS_ZERO: bool> {}
+
+impl FooImpl<{ 0u8 == 0u8 }> for [(); 0] {}
+
+impl<const N: usize> FooImpl<{ 0u8 != 0u8 }> for [(); N] {}
+
+fn foo<T: Foo>(_v: T) {}
+
+fn main() {
+    foo([]);
+    foo([()]);
+}