From 1dc99f1fa64c9d69a3a1a3441beee7033f47d1ca Mon Sep 17 00:00:00 2001
From: Robert Fewell <14uBobIT@gmail.com>
Date: Tue, 7 May 2019 15:49:12 +0100
Subject: [PATCH] Going back from 'Qif files you have loaded' crashes

Once you have unloaded all files on the above page and go back Gnucash
will crash as it was using an invalid file, check for selected_file in
the ...import_account_prepare function.
---
 .../qif-imp/assistant-qif-import.c            | 33 ++++++++++++-------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/gnucash/import-export/qif-imp/assistant-qif-import.c b/gnucash/import-export/qif-imp/assistant-qif-import.c
index 1fd99afbc9..5505e3ce0c 100644
--- a/gnucash/import-export/qif-imp/assistant-qif-import.c
+++ b/gnucash/import-export/qif-imp/assistant-qif-import.c
@@ -2104,21 +2104,32 @@ gnc_ui_qif_import_account_prepare (GtkAssistant  *assistant, gpointer user_data)
 
     if (wind->ask_date_format && wind->date_format)
         qif_import_reparse_dates (wind);
-   /* Determine the next page to display. */
-    if (scm_call_1 (check_from_acct, wind->selected_file) != SCM_BOOL_T)
-    {
-        /* There is an account name missing. Ask the user to provide one. */
-        SCM default_acct = scm_c_eval_string ("qif-file:path-to-accountname");
-        gchar * default_acctname = NULL;
 
-        default_acctname = gnc_scm_call_1_to_string (default_acct, wind->selected_file);
-        gtk_entry_set_text (GTK_ENTRY(wind->acct_entry), default_acctname);
-        g_free (default_acctname);
+    /* make sure there is a file selected, may of come back */
+    if (wind->selected_file == SCM_BOOL_F)
+    {
+        GtkAssistant *assistant = GTK_ASSISTANT(wind->window);
+        gtk_entry_set_text (GTK_ENTRY(wind->filename_entry), "");
+        gtk_assistant_set_current_page (assistant, 1);
     }
     else
     {
-        /* Skip ahead to the "loaded files" page. */
-        gtk_assistant_set_current_page (assistant, num + 1);
+        /* Determine the next page to display. */
+        if (scm_call_1 (check_from_acct, wind->selected_file) != SCM_BOOL_T)
+        {
+            /* There is an account name missing. Ask the user to provide one. */
+            SCM default_acct = scm_c_eval_string ("qif-file:path-to-accountname");
+            gchar * default_acctname = NULL;
+
+            default_acctname = gnc_scm_call_1_to_string (default_acct, wind->selected_file);
+            gtk_entry_set_text (GTK_ENTRY(wind->acct_entry), default_acctname);
+            g_free (default_acctname);
+        }
+        else
+        {
+            /* Skip ahead to the "loaded files" page. */
+            gtk_assistant_set_current_page (assistant, num + 1);
+        }
     }
 }