Fix panic when remote differ returns empty result

dmcgowan · dmcgowan · commit 0d975230e186 · 2023-04-29T22:55:21.000-07:00
Signed-off-by: Derek McGowan &lt;derek@mcg.dev&gt;
diff --git 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),

Original file line number	Diff line number	Diff line change
`@@ -100,6 +100,9 @@ func (r *diffRemote) Compare(ctx context.Context, a, b []mount.Mount, opts ...di`
`100`	`100`	`}`
`101`	`101`
`102`	`102`	`func toDescriptor(d *types.Descriptor) ocispec.Descriptor {`
	`103`	`+ if d == nil {`
	`104`	`+ return ocispec.Descriptor{}`
	`105`	`+ }`
`103`	`106`	`return ocispec.Descriptor{`
`104`	`107`	`MediaType: d.MediaType,`
`105`	`108`	`Digest: digest.Digest(d.Digest),`