This weekend I thought it would be a good idea to run the Eressea server both with and without optimizations enabled and compare the output. In theory, I thought, optimization should not change the results, and different results would hint at bugs like uninitialized variables or illegal memory access.

Needless to say, the output wasn’t the same. It was slightly different, and it looked like a small error snowballing towards the end. I’ll spare you the tale of a day trying to narrow down the exact location, and cut right to the chase:
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