From 9aaef06cf6a0c4e671c51f0d13a4ae6cf8b8dec5 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Thu, 19 Sep 2019 00:14:02 +0200
Subject: [PATCH] Fix the bootstrap

---
 src/librustc/ty/query/config.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/librustc/ty/query/config.rs b/src/librustc/ty/query/config.rs
index 91082c59ba05..c4b7b9d29b96 100644
--- a/src/librustc/ty/query/config.rs
+++ b/src/librustc/ty/query/config.rs
@@ -73,6 +73,14 @@ impl<'tcx, M: QueryAccessors<'tcx, Key = DefId>> QueryDescription<'tcx> for M {
             format!("processing {:?} with query `{}`", def_id, name).into()
         }
     }
+
+    default fn cache_on_disk(_: TyCtxt<'tcx>, _: Self::Key, _: Option<&Self::Value>) -> bool {
+        false
+    }
+
+    default fn try_load_from_disk(_: TyCtxt<'tcx>, _: SerializedDepNodeIndex) -> Option<Self::Value> {
+        bug!("QueryDescription::load_from_disk() called for an unsupported query.")
+    }
 }
 
 impl<'tcx> QueryDescription<'tcx> for queries::analysis<'tcx> {