From bc1e1d4d192831fbb07ec35a4fcb1f818ce4c5a0 Mon Sep 17 00:00:00 2001
From: Louis-Dominique Dubeau <ldd@lddubeau.com>
Date: Thu, 5 Jul 2018 19:26:04 -0400
Subject: [PATCH] fix: treat ?? in processing instructions correctly

---
 lib/saxes.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/saxes.js b/lib/saxes.js
index f6516011..17e85b83 100644
--- a/lib/saxes.js
+++ b/lib/saxes.js
@@ -543,6 +543,13 @@ class SAXParser {
           this.piTarget = this.piBody = "";
           this.state = S_TEXT;
         }
+        else if (c === "?") {
+          // We ran into ?? as part of a processing instruction. We initially
+          // took the first ? as a sign that the PI was ending, but it is
+          // not. So we have to add it to the body but we take the new ? as a
+          // sign that the PI is ending.
+          this.piBody += "?";
+        }
         else {
           this.piBody += `?${c}`;
           this.state = S_PI_BODY;