I'm encountering an intermittent segmentation fault when starting the game and resizing the window.
There's nothing of use in the gdb backtraces, sadly

To recreate:
1. Run the game.
2. Resize the game window.
3. Load a save. Notice that the save is running very slowly (possibly related to this : https://forums.factorio.com/forum/vie ... f=7&t=3619 ?) Note however, this problem can occur with or without a second monitor enabled.
4. Resize the game window again. Note that the save is now running at normal speed.
5. Resize again. Crash.
Why all the resizing? I like to play the game in a maximized window, so I normally maximize it while the resources are loading at startup. Often this works fine. Other times, the game runs slow. Unmaximizing has the interesting effect of making the game run normal speed again. However, when I re-maximize the window, I will usually encounter this segmentation fault.
Note: this problem is intermittent. There seem to be times when it works fine and I can resize the game window freely, so it may be that something is interfering with the GL state somehow.
System info: NVIDIA proprietary 340.24, Linux 3.14-2-amd64 (debian sid latest). There is a second monitor connected, but not always turned on in configuration. Factorio seems to prefer to start on it when it IS turned on, as it has a lower X value than the main monitor (as do many other apps *sigh*).