From 034dd41ea81264a6cb3f4e84d49a99ecd4a96406 Mon Sep 17 00:00:00 2001
From: Giacomo Stevanato <giaco.stevanato@gmail.com>
Date: Wed, 29 Sep 2021 21:06:44 +0200
Subject: [PATCH] Add regression test

---
 crates/hir_ty/src/tests/regression.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/crates/hir_ty/src/tests/regression.rs b/crates/hir_ty/src/tests/regression.rs
index 2f38d584a12..67952edca38 100644
--- a/crates/hir_ty/src/tests/regression.rs
+++ b/crates/hir_ty/src/tests/regression.rs
@@ -1198,3 +1198,26 @@ fn bar() {
     "#,
     )
 }
+
+#[test]
+fn nested_macro_in_fn_params() {
+    check_no_mismatches(
+        r#"
+macro_rules! U32Inner {
+    () => {
+        u32
+    };
+}
+
+macro_rules! U32 {
+    () => {
+        U32Inner!()
+    };
+}
+
+fn mamba(a: U32!(), p: u32) -> u32 {
+    a
+}
+    "#,
+    )
+}