Do not ICE on closure typeck

Tackle #66868.
rust-lang · Dec 5, 2019 · 22c65f9 · 22c65f9
1 parent 1e2a738
commit 22c65f9
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs
@@ -2214,6 +2214,10 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
         }
 
         let span = self.tcx.def_span(generator_did);
+        // Do not ICE on closure typeck (#66868).
+        if let None = self.tcx.hir().as_local_hir_id(generator_did) {
+            return false;
+        }
         let tables = self.tcx.typeck_tables_of(generator_did);
         debug!("note_obligation_cause_for_async_await: generator_did={:?} span={:?} ",
                generator_did, span);