[rkward] /: Fix hang when opening empty workplace, and associated crash on exit.

[Thomas Friedrichsmeier]

Git commit 7dc28480fe742396a4e1f0758b763ce80d932e1d by Thomas Friedrichsmeier.
Committed on 02/05/2020 at 09:34.
Pushed by tfry into branch 'master'.

Fix hang when opening empty workplace, and associated crash on exit.

BUG: 420888

M  +1    -0    ChangeLog
M  +1    -0    rkward/rkward.cpp
M  +1    -1    rkward/windows/rkworkplaceview.cpp

https://commits.kde.org/rkward/7dc28480fe742396a4e1f0758b763ce80d932e1d

diff --git a/ChangeLog b/ChangeLog
index 0523f960..c66aa676 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,5 @@
 --- Version 0.7.2 - UNRELEASED
+- Fixed: Hang when opening an empty workplace
 - Fixed: Crash when mousing over code preview window with focus-follows-mouse enabled
 - Add menu action to open any supported file type, directly
 - Support using QWebEngine instead of QtWebKit (still supported)
diff --git a/rkward/rkward.cpp b/rkward/rkward.cpp
index d6b51556..7bae19a3 100644
--- a/rkward/rkward.cpp
+++ b/rkward/rkward.cpp
@@ -658,6 +658,7 @@ void RKWardMainWindow::partChanged (KParts::Part *part) {
 	RK_TRACE (APP);
 
 	if (gui_rebuild_locked) return;
+	if (!part) return;
 	createGUI (part);
 
 	if (!guiFactory ()) {
diff --git a/rkward/windows/rkworkplaceview.cpp b/rkward/windows/rkworkplaceview.cpp
index 2200f5da..3168e23d 100644
--- a/rkward/windows/rkworkplaceview.cpp
+++ b/rkward/windows/rkworkplaceview.cpp
@@ -586,7 +586,7 @@ void RKWorkplaceView::purgeEmptyPanes () {
 
 	newpane = 0; // just in case of broken specifications during workplace restoration
 	for (int i = 0; i < panes.count (); ++i) {
-		if (panes[i]->count () < 1) {
+		if (panes.count() > 1 && panes[i]->count() < 1) {
 			purgePane (panes[i]);
 			--i;
 		}