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Qt: delete race condition when exiting if the gotodlg was shown
SIGSEV when exiting if the gotodlg was ever shown. This was caused by the gotodlg class destructor and the global cleanup thread deleting the same 'working' map tile. This proposed fix minimizes the 'working' tile exposure that is held by the gotodlg class.
#2 Updated by John Robertson 3 months ago
Any Qt branch that caches the 'working' tile (not sure when that was introduced); I haven't checked the S3_0 or S2_6 branches yet. I have mainly been working on a unit-stack-count for the map view (see Feature #911906: Qt - in the map view, display the unit stack count). I have the Qt platform working and need to implement the two GTK and the one SDL platforms. I'll work on this in conjunction with the unit-stack-count feature.
#4 Updated by Marko Lindqvist 3 months ago
- Status changed from New to In Progress
John Robertson wrote:
the gotodlg class destructor and the global cleanup thread deleting the same 'working' map tile.
There's no multiple threads in play in here, and it's not double free that it's trying to do.
Rather it seems that city hash has already been freed ( idex_free() ) when the destructor is called, causing lookup for the city on tile to crash. We free city hash as part of our explicit cleanup, before global destructors run.
#6 Updated by Marko Lindqvist 3 months ago
- File 0020-Qt-Popdown-gotodlg-when-leaving-the-game.patch 0020-Qt-Popdown-gotodlg-when-leaving-the-game.patch added
- Status changed from In Progress to Resolved
- Sprint/Milestone set to 2.6.4
Here's my proposal for the fix.