Rollup merge of #98195 - GuillaumeGomez:rustdoc-json-primitive, r=notriddle

Fix rustdoc json primitive handling

Fixes #98006.

cc `@matthiaskrgr`

Author: JohnTitor

src/librustdoc/json/mod.rs

@@ -201,7 +201,8 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
 
                 types::ItemEnum::Method(_)
                 | types::ItemEnum::AssocConst { .. }
-                | types::ItemEnum::AssocType { .. } => true,
+                | types::ItemEnum::AssocType { .. }
+                | types::ItemEnum::PrimitiveType(_) => true,
                 types::ItemEnum::Module(_)
                 | types::ItemEnum::ExternCrate { .. }
                 | types::ItemEnum::Import(_)
@@ -216,8 +217,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 | types::ItemEnum::Static(_)
                 | types::ItemEnum::ForeignType
                 | types::ItemEnum::Macro(_)
-                | types::ItemEnum::ProcMacro(_)
-                | types::ItemEnum::PrimitiveType(_) => false,
+                | types::ItemEnum::ProcMacro(_) => false,
             };
             let removed = self
                 .index

src/test/rustdoc-json/primitive_overloading.rs

@@ -0,0 +1,17 @@
+// compile-flags: --document-private-items
+
+// Regression test for <https://github.com/rust-lang/rust/issues/98006>.
+
+#![feature(rustdoc_internals)]
+#![feature(no_core)]
+
+#![no_core]
+
+// @has primitive_overloading.json
+// @has - "$.index[*][?(@.name=='usize')]"
+// @has - "$.index[*][?(@.name=='prim')]"
+
+#[doc(primitive = "usize")]
+/// This is the built-in type `usize`.
+mod prim {
+}