From a79b54ef7323d38b8c02094de32fb45a7c8fff8a Mon Sep 17 00:00:00 2001
From: ivan770 <leshenko.ivan770@gmail.com>
Date: Sun, 16 May 2021 20:05:52 +0200
Subject: Fix #8834

---
 crates/hir_def/src/nameres/collector.rs |  4 ++++
 crates/hir_def/src/nameres/tests.rs     | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

(limited to 'crates/hir_def')

diff --git a/crates/hir_def/src/nameres/collector.rs b/crates/hir_def/src/nameres/collector.rs
index adfb78c94..cebc2dc40 100644
--- a/crates/hir_def/src/nameres/collector.rs
+++ b/crates/hir_def/src/nameres/collector.rs
@@ -481,6 +481,10 @@ impl DefCollector<'_> {
         let res = self.def_map.resolve_name_in_extern_prelude(self.db, &extern_crate.name);
 
         if let Some(ModuleDefId::ModuleId(m)) = res.take_types() {
+            if m == self.def_map.module_id(current_module_id) {
+                return;
+            }
+
             cov_mark::hit!(macro_rules_from_other_crates_are_visible_with_macro_use);
             self.import_all_macros_exported(current_module_id, m.krate);
         }
diff --git a/crates/hir_def/src/nameres/tests.rs b/crates/hir_def/src/nameres/tests.rs
index 4f2e7a2f9..91c37a55d 100644
--- a/crates/hir_def/src/nameres/tests.rs
+++ b/crates/hir_def/src/nameres/tests.rs
@@ -410,6 +410,21 @@ struct Arc;
     );
 }
 
+#[test]
+fn extern_crate_self() {
+    check(
+        r#"
+//- /main.rs crate:main
+#[macro_use]
+extern crate self as bla;
+"#,
+        expect![[r#"
+            crate
+            bla: t
+        "#]],
+    );
+}
+
 #[test]
 fn reexport_across_crates() {
     check(
-- 
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