From 54908ec03fb15b392bafe02ef302961b631c9d1a Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Fri, 20 Nov 2020 20:35:26 -0800
Subject: [PATCH] cache: handle nil result from flightcontrol

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 cache/refs.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cache/refs.go b/cache/refs.go
index 2b25235e..8c38ef63 100644
--- a/cache/refs.go
+++ b/cache/refs.go
@@ -454,6 +454,9 @@ func (sr *immutableRef) prepareRemoteSnapshots(ctx context.Context, dhs DescHand
 		// This layer cannot be prepared without unlazying.
 		return false, nil
 	})
+	if err != nil {
+		return false, err
+	}
 	return ok.(bool), err
 }