From f75f05e7b7235a75db161b6a4bd5ee07450c6034 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Tue, 31 Jan 2023 15:37:33 +0100
Subject: [PATCH]  Fix crash in Zenity filechooser with badly formed filter
 (#665)

---
 src/Fl_Native_File_Chooser_Kdialog.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Fl_Native_File_Chooser_Kdialog.cxx b/src/Fl_Native_File_Chooser_Kdialog.cxx
index db17d15ed..6fc27f1ec 100644
--- a/src/Fl_Native_File_Chooser_Kdialog.cxx
+++ b/src/Fl_Native_File_Chooser_Kdialog.cxx
@@ -208,6 +208,7 @@ char *Fl_Kdialog_Native_File_Chooser_Driver::parse_filter(const char *f) {
     char *lead = new char[r-p];
     memcpy(lead, p+1, (r-p)-1); lead[(r-p)-1] = 0;
     const char *r2 = strchr(r, '}');
+    if (!r2) return NULL;
     char *ends = new char[r2-r];
     memcpy(ends, r+1, (r2-r)-1); ends[(r2-r)-1] = 0;
     char *ptr;
@@ -248,6 +249,7 @@ void Fl_Kdialog_Native_File_Chooser_Driver::filter(const char *f) {
   char *part = strtok_r(f2, "\n", &ptr);
   while (part) {
     char *p = parse_filter(part);
+    if (!p) break;
     _parsedfilt = strapp(_parsedfilt, p);
     _parsedfilt = strapp(_parsedfilt, "\n");
     delete[] p;