Fix #14741: crash on macOS exit (#15550)

distribution/changelog.txt

@@ -15,6 +15,7 @@
 - Fix: [#14316] Closing the Track Designs Manager window causes broken state.
 - Fix: [#14649] ImageImporter incorrectly remaps colours outside the RCT2 palette.
 - Fix: [#14667] “Extreme Hawaiian Island” has unpurchaseable land tiles (original bug).
+- Fix: [#14741] Crash when exiting OpenRCT2 on macOS.
 - Fix: [#15096] Crash when placing entrances in the scenario editor near the map corner.
 - Fix: [#15136] Exported SV6 files cause vanilla RCT2 to hang.
 - Fix: [#15142] ToonTowner's mine roofs were moved into the pirate theme scenery group instead of the mine theme scenery group.

src/openrct2/paint/Painter.cpp

@@ -170,3 +170,12 @@ void Painter::ReleaseSession(paint_session* session)
     session->PaintEntryChain.Clear();
     _freePaintSessions.push_back(session);
 }
+
+Painter::~Painter()
+{
+    for (auto&& session : _paintSessionPool)
+    {
+        ReleaseSession(session.get());
+    }
+    _paintSessionPool.clear();
+}

src/openrct2/paint/Painter.h

@@ -49,6 +49,7 @@ namespace OpenRCT2
 
             paint_session* CreateSession(rct_drawpixelinfo* dpi, uint32_t viewFlags);
             void ReleaseSession(paint_session* session);
+            ~Painter();
 
         private:
             void PaintReplayNotice(rct_drawpixelinfo* dpi, const char* text);