Add 83993

Issue: rust-lang/rust#83993

Author: fanninpm

ices/83993.rs

@@ -0,0 +1,8 @@
+#![feature(const_generics)]
+fn bug<'a>()
+where
+    for<'b> [(); {
+        let x: &'b ();
+        0
+    }]:
+{}