Add regression test for json reexport bug

src/test/rustdoc-json/reexport/same_type_reexported_more_than_once.rs

@@ -0,0 +1,17 @@
+// Regression test for https://github.com/rust-lang/rust/issues/97432.
+
+#![feature(no_core)]
+#![no_std]
+#![no_core]
+
+// @has same_type_reexported_more_than_once.json
+// @set trait_id = - "$.index[*][?(@.name=='Trait')].id"
+// @has - "$.index[*][?(@.name=='same_type_reexported_more_than_once')].inner.items[*]" $trait_id
+pub use inner::Trait;
+// @set reexport_id = - "$.index[*][?(@.name=='Reexport')].id"
+// @has - "$.index[*][?(@.name=='same_type_reexported_more_than_once')].inner.items[*]" $reexport_id
+pub use inner::Trait as Reexport;
+
+mod inner {
+    pub trait Trait {}
+}