From 523cadea3dc025e4fdc8fc7c3d0a85ae61619b75 Mon Sep 17 00:00:00 2001
From: Tom Yeh <tomyeh@potix.com>
Date: Wed, 21 Feb 2024 01:30:29 +0800
Subject: [PATCH] Fix dart-lang/markdown#578: list with checkbox mixed with
 empty lines (dart-lang/markdown#583)

---
 .../lib/src/block_syntaxes/list_syntax.dart      |  1 +
 .../extensions/ordered_list_with_checkboxes.unit | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/pkgs/markdown/lib/src/block_syntaxes/list_syntax.dart b/pkgs/markdown/lib/src/block_syntaxes/list_syntax.dart
index c911ee701..d8711bb60 100644
--- a/pkgs/markdown/lib/src/block_syntaxes/list_syntax.dart
+++ b/pkgs/markdown/lib/src/block_syntaxes/list_syntax.dart
@@ -214,6 +214,7 @@ abstract class ListSyntax extends BlockSyntax {
           indent = precedingWhitespaces + contentWhitespances;
         }
 
+        taskListItemState = null;
         var content = contentBlockStart != null && !isBlank
             ? parseTaskListItem(textParser.substring(contentBlockStart))
             : '';
diff --git a/pkgs/markdown/test/extensions/ordered_list_with_checkboxes.unit b/pkgs/markdown/test/extensions/ordered_list_with_checkboxes.unit
index 3dce7b74e..8503e56e9 100644
--- a/pkgs/markdown/test/extensions/ordered_list_with_checkboxes.unit
+++ b/pkgs/markdown/test/extensions/ordered_list_with_checkboxes.unit
@@ -60,4 +60,20 @@
 <pre><code>[ ] four
 </code></pre>
 </li>
+</ol>
+>>> checkbox with empty content
+1. [ ] one
+2.
+3. 
+4. four
+5. [ ] five
+6.
+<<<
+<ol class="contains-task-list">
+<li class="task-list-item"><input type="checkbox"></input>one</li>
+<li></li>
+<li></li>
+<li>four</li>
+<li class="task-list-item"><input type="checkbox"></input>five</li>
+<li></li>
 </ol>
\ No newline at end of file