SphinxOres is hitting a VERIFY()

[xoft]

That's only a secondary damage. The first verification fail causes the server to abort, which calls the cNetworkSingleton destructor without deinitializing first, so it asserts for the second time.
The real culprit is somewhere in the lighting code, it requests chunk data for a nonexistent chunk, although one should be present, because it's all running inside a cChunkStay.