Fix signed zero handling in expr.LookupCompare #4861
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LookupCompare fails to account for the fact that a floating-point zero is signed. As a result, a ZNG set containing both negative and positive zero does not have a canonical form. Fix by ordering negative zero before positive zero. The implementation changes the ordering of NaNs whose sign bit is set but that shouldn't matter.
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mccanne
approved these changes
Nov 9, 2023
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LookupCompare fails to account for the fact that a floating-point zero is signed. As a result, a ZNG set containing both negative and positive zero does not have a canonical form. Fix by ordering negative zero before positive zero. The implementation changes the ordering of NaNs whose sign bit is set but that shouldn't matter.