From 4bc789b5b1fbbbf1d448abcdd17970e97ae70c28 Mon Sep 17 00:00:00 2001
From: Josh Stone <jistone@redhat.com>
Date: Thu, 23 Oct 2025 12:23:30 -0700
Subject: [PATCH] Add a regression test for rust-lang/rust#147971

(cherry picked from commit a81ed52f5830b6a305ad8e8547196744d460afa0)
---
 library/std/tests/ambiguous-hash_map.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 library/std/tests/ambiguous-hash_map.rs

diff --git a/library/std/tests/ambiguous-hash_map.rs b/library/std/tests/ambiguous-hash_map.rs
new file mode 100644
index 000000000000..bd5ae5a8957b
--- /dev/null
+++ b/library/std/tests/ambiguous-hash_map.rs
@@ -0,0 +1,17 @@
+//! Make sure that a `std` macro `hash_map!` does not cause ambiguity
+//! with a local glob import with the same name.
+//!
+//! See regression https://github.com/rust-lang/rust/issues/147971
+
+mod module {
+    macro_rules! hash_map {
+        () => {};
+    }
+    pub(crate) use hash_map;
+}
+
+use module::*;
+
+fn main() {
+    hash_map! {}
+}