From 9a8572bd215eead276afc189c9a35d6d3baba433 Mon Sep 17 00:00:00 2001
From: HamletDuFromage <61667930+HamletDuFromage@users.noreply.github.com>
Date: Mon, 12 Aug 2024 08:54:37 +0200
Subject: [PATCH] WebUI: Handle regex syntax error for torrent filtering

https://github.com/qbittorrent/qBittorrent/pull/20566#discussion_r1704548226

PR #21173.
---
 src/webui/www/private/scripts/dynamicTable.js | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/webui/www/private/scripts/dynamicTable.js b/src/webui/www/private/scripts/dynamicTable.js
index e68f2398c..246b237b0 100644
--- a/src/webui/www/private/scripts/dynamicTable.js
+++ b/src/webui/www/private/scripts/dynamicTable.js
@@ -1527,13 +1527,19 @@ window.qBittorrent.DynamicTable ??= (() => {
         getFilteredAndSortedRows: function() {
             const filteredRows = [];
 
-            const rows = this.rows.getValues();
             const useRegex = $("torrentsFilterRegexBox").checked;
             const filterText = $("torrentsFilterInput").value.trim().toLowerCase();
-            const filterTerms = (filterText.length > 0)
-                ? (useRegex ? new RegExp(filterText) : filterText.split(" "))
-                : null;
+            let filterTerms;
+            try {
+                filterTerms = (filterText.length > 0)
+                    ? (useRegex ? new RegExp(filterText) : filterText.split(" "))
+                    : null;
+            }
+            catch (e) { // SyntaxError: Invalid regex pattern
+                return filteredRows;
+            }
 
+            const rows = this.rows.getValues();
             for (let i = 0; i < rows.length; ++i) {
                 if (this.applyFilter(rows[i], selected_filter, selected_category, selectedTag, selectedTracker, filterTerms)) {
                     filteredRows.push(rows[i]);