Auto merge of #79377 - jonas-schievink:rollup-ye81i66, r=jonas-schievink

Rollup of 10 pull requests

Successful merges:

 - #76858 (Add exploit mitigations chapter to the rustc book)
 - #79310 (Make `fold_item_recur` non-nullable)
 - #79312 (Get rid of `doctree::Impl`)
 - #79321 (Accept '!' in intra-doc links)
 - #79346 (Allow using `-Z fewer-names=no` to retain value names)
 - #79351 (Fix typo in `keyword` docs for traits)
 - #79354 (BTreeMap: cut out the ceremony around BoxedNode)
 - #79358 (BTreeMap/BTreeSet: make public doc more consistent)
 - #79367 (Allow disabling TrapUnreachable via -Ztrap-unreachable=no)
 - #79374 (Add note to use nightly when using expr in const generics)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustdoc/html/sources.rs b/src/librustdoc/html/sources.rs
index 0f82649409f..e7b5a90d84d 100644
--- a/src/librustdoc/html/sources.rs
+++ b/src/librustdoc/html/sources.rs
@@ -60,7 +60,7 @@ impl<'a> DocFolder for SourceCollector<'a> {
                 }
             };
         }
-        self.fold_item_recur(item)
+        Some(self.fold_item_recur(item))
     }
 }