https://github.com/Stellarium/stellarium/commit/5023376c32668771db8757c3fae61289efd26cc3

From 5023376c32668771db8757c3fae61289efd26cc3 Mon Sep 17 00:00:00 2001
From: "Alexander V. Wolf" <alex.v.wolf@gmail.com>
Date: Mon, 29 Dec 2025 21:59:39 +0700
Subject: [PATCH] Fixed crash at exit from Stellarium in macOS

---
 plugins/Calendars/src/Calendars.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugins/Calendars/src/Calendars.cpp b/plugins/Calendars/src/Calendars.cpp
index d33eb31902349..882358dcc7ea4 100644
--- a/plugins/Calendars/src/Calendars.cpp
+++ b/plugins/Calendars/src/Calendars.cpp
@@ -170,9 +170,11 @@ Calendars::Calendars():
 Calendars::~Calendars()
 {
 	delete configDialog; configDialog=nullptr;
-	for (auto c = calendars.cbegin(), end = calendars.cend(); c != end; ++c)
+	QMapIterator<QString, Calendar*> i(calendars);
+	while (i.hasNext())
 	{
-		Calendar *cal = calendars.take(c.key());
+		i.next();
+		Calendar *cal = calendars.take(i.key());
 		delete cal;
 	}
 	if (infoPanel) delete infoPanel;