From fa0782d729234fa79256e9da165bf24f64bbef54 Mon Sep 17 00:00:00 2001
From: David Anson <david@dlaa.me>
Date: Sun, 12 Jun 2022 18:00:37 -0700
Subject: [PATCH] Use '\0' instead of ']' to allow end-of-block detection for
 single-line RegExp in getReferenceLinkImageData.

---
 demo/markdownlint-browser.js | 6 +++---
 helpers/helpers.js           | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/demo/markdownlint-browser.js b/demo/markdownlint-browser.js
index 0a0b5611..341ed59e 100644
--- a/demo/markdownlint-browser.js
+++ b/demo/markdownlint-browser.js
@@ -53,7 +53,7 @@ module.exports.orderedListItemMarkerRe = /^[\s>]*0*(\d+)[.)]/;
 // Regular expression for all instances of emphasis markers
 const emphasisMarkersRe = /[_*]/g;
 // Regular expression for reference links (full and collapsed but not shortcut)
-const referenceLinkRe = /!?\\?\[((?:\[[^\]]*]|[^\]])*)](?:(?:\[([^\]]*)\])|[^(]|$)/g;
+const referenceLinkRe = /!?\\?\[((?:\[[^\]\0]*]|[^\]\0])*)](?:(?:\[([^\]\0]*)\])|[^(]|$)/g;
 // Regular expression for link reference definitions
 const linkReferenceDefinitionRe = /^ {0,3}\[([^\]]*[^\\])]:/;
 module.exports.linkReferenceDefinitionRe = linkReferenceDefinitionRe;
@@ -809,8 +809,8 @@ function getReferenceLinkImageData(params, lineMetadata) {
         lineOffsets[lineIndex] = currentOffset;
         if (!inCode) {
             if (line.trim().length === 0) {
-                // Close any unclosed brackets at the end of a block
-                line = "]";
+                // Allow RegExp to detect the end of a block
+                line = "\0";
             }
             contentLines.push(line);
             currentOffset += line.length + 1;
diff --git a/helpers/helpers.js b/helpers/helpers.js
index 79a8fa4a..8c8e1b7e 100644
--- a/helpers/helpers.js
+++ b/helpers/helpers.js
@@ -32,7 +32,7 @@ const emphasisMarkersRe = /[_*]/g;
 
 // Regular expression for reference links (full and collapsed but not shortcut)
 const referenceLinkRe =
-  /!?\\?\[((?:\[[^\]]*]|[^\]])*)](?:(?:\[([^\]]*)\])|[^(]|$)/g;
+  /!?\\?\[((?:\[[^\]\0]*]|[^\]\0])*)](?:(?:\[([^\]\0]*)\])|[^(]|$)/g;
 
 // Regular expression for link reference definitions
 const linkReferenceDefinitionRe = /^ {0,3}\[([^\]]*[^\\])]:/;
@@ -831,8 +831,8 @@ function getReferenceLinkImageData(params, lineMetadata) {
     lineOffsets[lineIndex] = currentOffset;
     if (!inCode) {
       if (line.trim().length === 0) {
-        // Close any unclosed brackets at the end of a block
-        line = "]";
+        // Allow RegExp to detect the end of a block
+        line = "\0";
       }
       contentLines.push(line);
       currentOffset += line.length + 1;