From 0d975230e1862110d7885d490bc8d20c9caada30 Mon Sep 17 00:00:00 2001
From: Derek McGowan <derek@mcg.dev>
Date: Sat, 29 Apr 2023 22:55:21 -0700
Subject: [PATCH] Fix panic when remote differ returns empty result

Signed-off-by: Derek McGowan <derek@mcg.dev>
---
 diff/proxy/differ.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/diff/proxy/differ.go b/diff/proxy/differ.go
index 8ed8bdf4d..f0e547f81 100644
--- a/diff/proxy/differ.go
+++ b/diff/proxy/differ.go
@@ -100,6 +100,9 @@ func (r *diffRemote) Compare(ctx context.Context, a, b []mount.Mount, opts ...di
 }
 
 func toDescriptor(d *types.Descriptor) ocispec.Descriptor {
+	if d == nil {
+		return ocispec.Descriptor{}
+	}
 	return ocispec.Descriptor{
 		MediaType:   d.MediaType,
 		Digest:      digest.Digest(d.Digest),