Fix panic when remote differ returns empty result

dmcgowan · thaJeztah · commit f98122378197 · 2023-06-03T11:22:42.000+02:00
Signed-off-by: Derek McGowan <derek@mcg.dev> (cherry picked from commit 0d97523) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
diff --git a/diff.go b/diff.go
@@ -86,6 +86,9 @@ 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:      d.Digest,

Original file line number	Diff line number	Diff line change
`@@ -86,6 +86,9 @@ func (r *diffRemote) Compare(ctx context.Context, a, b []mount.Mount, opts ...di`
`86`	`86`	`}`
`87`	`87`
`88`	`88`	`func toDescriptor(d *types.Descriptor) ocispec.Descriptor {`
	`89`	`+ if d == nil {`
	`90`	`+ return ocispec.Descriptor{}`
	`91`	`+ }`
`89`	`92`	`return ocispec.Descriptor{`
`90`	`93`	`MediaType: d.MediaType,`
`91`	`94`	`Digest: d.Digest,`