From 7eef36c732df996ab6508bfb5cee17a7763097f1 Mon Sep 17 00:00:00 2001
From: Evan Phoenix <evan@phx.io>
Date: Sat, 27 Jan 2024 15:33:55 -0800
Subject: [PATCH] Guard using options to avoid a crash bug

---
 v5/patch.go | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/v5/patch.go b/v5/patch.go
index d9e23f6..d658b16 100644
--- a/v5/patch.go
+++ b/v5/patch.go
@@ -142,13 +142,21 @@ func (n *partialDoc) TrustMarshalJSON(buf *bytes.Buffer) error {
 	if err := buf.WriteByte('{'); err != nil {
 		return err
 	}
+	escaped := true
+
+	// n.opts should always be set, but in case we missed a case,
+	// guard.
+	if n.opts != nil {
+		escaped = n.opts.EscapeHTML
+	}
+
 	for i, k := range n.keys {
 		if i > 0 {
 			if err := buf.WriteByte(','); err != nil {
 				return err
 			}
 		}
-		key, err := json.MarshalEscaped(k, n.opts.EscapeHTML)
+		key, err := json.MarshalEscaped(k, escaped)
 		if err != nil {
 			return err
 		}
@@ -158,7 +166,7 @@ func (n *partialDoc) TrustMarshalJSON(buf *bytes.Buffer) error {
 		if err := buf.WriteByte(':'); err != nil {
 			return err
 		}
-		value, err := json.MarshalEscaped(n.obj[k], n.opts.EscapeHTML)
+		value, err := json.MarshalEscaped(n.obj[k], escaped)
 		if err != nil {
 			return err
 		}