Upload save as this time it may be reproducible bug.
Also update SVN to latest version.
In the Civ BtS folder were the BtS.exe resides you should find a file with a .dmp extension.
A minidump was finally created after repeatedly running the save, so I can actually upload it.
Save is unrecalculated, saved on the latest SVN version.
Crash happens after the end of turn every time around when the Egyptian unit takes out my obsidian swordsman.