Infinite loop fix on incomplete uls

js/markdown.js

@@ -681,7 +681,7 @@ class MDBaseListBlockReader extends MDBlockReader {
 	 */
 	readListItemContent(state, firstLineStartPos) {
 		const itemLines = this.#readItemLines(state, firstLineStartPos);
-		state.p += itemLines.length;
+		state.p += Math.max(itemLines.length, 1);
 
 		if (itemLines.length == 1) {
 			return new MDInlineBlock(state.inlineMarkdownToSpans(itemLines[0]));

testjs.html

@@ -905,6 +905,17 @@
 					this.assertEqual(actual, expected);
 				}
 
+				test_unorderedList_hitch() {
+					// This incomplete bulleted list locked up the browser at one
+					// point, not forever but a REALLY long time
+					this.profile(1.0, () => {
+						let markdown = "Testing\n\n* ";
+						let expected = '<p>Testing</p> <ul> <li></li> </ul>';
+						let actual = this.md(markdown);
+						this.assertEqual(actual, expected);
+					});
+				}
+
 				test_orderedList() {
 					let markdown = "1. Lorem\n1. Ipsum\n5. Dolor";
 					let expected = '<ol> <li>Lorem</li> <li>Ipsum</li> <li>Dolor</li> </ol>';