Fix panic due to non-total ordering in Area::compare_order()
#5569
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emilk
approved these changes
Jan 2, 2025
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Area::compare_order() is not a total ordering. If three layers A, B, and C have the same
orderfield but only A and B are present inorder_map, thenA==CandB==CbutA!=C. This can cause a panic in the stdlib sort function, and does in my app although it's very difficult to reproduce../scripts/check.sh