privacy: Avoid one more unwrap causing an ICE in rustdoc

The issue is rustdoc-specific because its root cause if the `everybody_loops` pass makes some def-ids to not have local hir-ids

Author: petrochenkov

src/librustc_privacy/lib.rs

@@ -880,11 +880,11 @@ impl Visitor<'tcx> for EmbargoVisitor<'tcx> {
             self.tcx,
             self.tcx.hir().local_def_id(md.hir_id)
         ).unwrap();
-        let mut module_id = self.tcx.hir().as_local_hir_id(macro_module_def_id).unwrap();
-        if !self.tcx.hir().is_hir_id_module(module_id) {
-            // `module_id` doesn't correspond to a `mod`, return early (#63164).
-            return;
-        }
+        let mut module_id = match self.tcx.hir().as_local_hir_id(macro_module_def_id) {
+            Some(module_id) if self.tcx.hir().is_hir_id_module(module_id) => module_id,
+            // `module_id` doesn't correspond to a `mod`, return early (#63164, #65252).
+            _ => return,
+        };
         let level = if md.vis.node.is_pub() { self.get(module_id) } else { None };
         let new_level = self.update(md.hir_id, level);
         if new_level.is_none() {

src/test/rustdoc/macro-in-closure.rs

@@ -0,0 +1,9 @@
+// Regression issue for rustdoc ICE encountered in PR #65252.
+
+#![feature(decl_macro)]
+
+fn main() {
+    || {
+        macro m() {}
+    };
+}