From 93ab70565575e5595e1a527298e9f16545543b33 Mon Sep 17 00:00:00 2001
From: Aaron Hill <aa1ronham@gmail.com>
Date: Sun, 3 Jan 2021 09:30:33 -0500
Subject: [PATCH] Print result on unstable fingerprint error

---
 compiler/rustc_query_system/src/query/plumbing.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_query_system/src/query/plumbing.rs b/compiler/rustc_query_system/src/query/plumbing.rs
index 5fab62dc82a..9bbc39d1f41 100644
--- a/compiler/rustc_query_system/src/query/plumbing.rs
+++ b/compiler/rustc_query_system/src/query/plumbing.rs
@@ -564,7 +564,7 @@ fn incremental_verify_ich<CTX, K, V: Debug>(
 
     let old_hash = tcx.dep_graph().fingerprint_of(dep_node_index);
 
-    assert!(new_hash == old_hash, "found unstable fingerprints for {:?}", dep_node,);
+    assert!(new_hash == old_hash, "found unstable fingerprints for {:?}: result {:?}", dep_node, result);
 }
 
 fn force_query_with_job<C, CTX>(