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-rw-r--r--compiler/rustc_query_impl/src/plumbing.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
index 12a3f2ac802..def6ac280b8 100644
--- a/compiler/rustc_query_impl/src/plumbing.rs
+++ b/compiler/rustc_query_impl/src/plumbing.rs
@@ -183,7 +183,7 @@ pub(super) fn encode_all_query_results<'tcx>(
     encoder: &mut CacheEncoder<'_, 'tcx>,
     query_result_index: &mut EncodedDepNodeIndex,
 ) {
-    for encode in super::ENCODE_QUERY_RESULTS.iter().copied().filter_map(|e| e) {
+    for encode in super::ENCODE_QUERY_RESULTS.iter().copied().flatten() {
         encode(tcx, encoder, query_result_index);
     }
 }