1 files changed, 24 insertions, 0 deletions

diff --git a/tests/ui/const-generics/issues/issue-86820.rs b/tests/ui/const-generics/issues/issue-86820.rs
new file mode 100644
index 00000000000..ae4bd943fd4
--- /dev/null
+++ b/tests/ui/const-generics/issues/issue-86820.rs
@@ -0,0 +1,24 @@
+// Regression test for the ICE described in #86820.
+
+#![allow(unused, dead_code)]
+use std::ops::BitAnd;
+
+const C: fn() = || is_set();
+fn is_set() {
+    0xffu8.bit::<0>();
+}
+
+trait Bits {
+    fn bit<const I: u8>(self) -> bool;
+}
+
+impl Bits for u8 {
+    fn bit<const I: usize>(self) -> bool {
+        //~^ ERROR: method `bit` has an incompatible generic parameter for trait `Bits` [E0053]
+        let i = 1 << I;
+        let mask = u8::from(i);
+        mask & self == mask
+    }
+}
+
+fn main() {}