From 22c65f924266ba738fa3621ea07d31bc7ba8c45f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Esteban=20K=C3=BCber?= <esteban@kuber.com.ar>
Date: Thu, 5 Dec 2019 09:21:52 -0800
Subject: [PATCH] Do not ICE on closure typeck

Tackle #66868.
---
 src/librustc/traits/error_reporting.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs
index ba44c6c3b9a1f..b644175a309c9 100644
--- 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);