From f0ecc0e2ebd33f7286d22adf1b12c77f45fba771 Mon Sep 17 00:00:00 2001
From: John Ralls <jralls@ceridwen.us>
Date: Thu, 5 Aug 2021 15:41:03 -0700
Subject: [PATCH] std::string(char*) crashes if it's given a nullptr.

---
 gnucash/gnome-utils/dialog-options.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/gnucash/gnome-utils/dialog-options.cpp b/gnucash/gnome-utils/dialog-options.cpp
index bc632648b1..03aa010697 100644
--- a/gnucash/gnome-utils/dialog-options.cpp
+++ b/gnucash/gnome-utils/dialog-options.cpp
@@ -2320,8 +2320,11 @@ public:
     {
         auto string = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(get_widget()));
         DEBUG("filename %s", string ? string : "(null)");
-        option.set_value(std::string{string});
-        g_free(string);
+        if (string)
+        {
+            option.set_value(std::string{string});
+            g_free(string);
+        }
     }
 };