Looks like INT64_MIN isn't a thing on MSVC Windows. You might just have to #indef INT64_MIN; hardcode the values. Can you put some tests in so we can see what it is you're trying to fix and particularly, if this fix will behave on non-64bit machines.

Ah interesting - I'll have to look further into that. I fixed this downstream in pandas and didn't have the MSVC issue; must be something different with the compilation options

Ignore previous comment around test - for sure I'll add that

Bah sorry it is in the test suite already:

Codecov Report

Merging #606 (71ea705) into main (6c2514e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 71ea705 differs from pull request most recent head f5e06e4. Consider uploading reports for the commit f5e06e4 to get more accurate results

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@@           Coverage Diff           @@
##             main     #606   +/-   ##
=======================================
  Coverage   91.66%   91.67%           
=======================================
  Files           6        6           
  Lines        1944     1946    +2     
=======================================
+ Hits         1782     1784    +2     
  Misses        162      162           

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Thanks!