rustdoc-search: fix mismatched path when parent re-exported twice

tests/rustdoc-js/reexport.js

@@ -14,4 +14,13 @@ const EXPECTED = [
             { 'path': 'reexport', 'name': 'AnotherOne' },
         ],
     },
+    {
+        'query': 'fn:Equivalent::equivalent',
+        'others': [
+            // These results must never contain `reexport::equivalent::NotEquivalent`,
+            // since that path does not exist.
+            { 'path': 'equivalent::Equivalent', 'name': 'equivalent' },
+            { 'path': 'reexport::NotEquivalent', 'name': 'equivalent' },
+        ],
+    },
 ];

tests/rustdoc-js/reexport.rs

@@ -2,6 +2,15 @@
 // This is a DWIM case, since renaming the export probably means the intent is also different.
 // For the de-duplication case of exactly the same name, see reexport-dedup
 
+//@ aux-crate:equivalent=equivalent.rs
+//@ compile-flags: --extern equivalent
+//@ aux-build:equivalent.rs
+//@ build-aux-docs
+#[doc(inline)]
+pub extern crate equivalent;
+#[doc(inline)]
+pub use equivalent::Equivalent as NotEquivalent;
+
 pub mod fmt {
     pub struct Subscriber;
 }