Add a regression test for #110933

Signed-off-by: Yuki Okushi <jtitor@2k36.org>

tests/ui/associated-consts/issue-110933.rs

@@ -0,0 +1,20 @@
+// check-pass
+
+#![feature(associated_const_equality)]
+
+pub trait Trait {
+    const ASSOC: usize;
+}
+
+pub fn foo<
+    T: Trait<
+        ASSOC = {
+                    let a = 10_usize;
+                    let b: &'_ usize = &a;
+                    *b
+                },
+    >,
+>() {
+}
+
+fn main() {}