FIX Decision/Extra trees: fix handling of missing values in detection of constant features #32274
+31
−26
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Reference Issues/PRs
Fixes #32272
What does this implement/fix? Explain your changes.
Simple fix of the if-condition detecting constant features.
Any other comments?
I'm not willing to write a lot of tests in this PR, as I'd rather move forward on this testing-focused PR instead: #32193
Indeed it's the test from this PR that made me find this bug (and also detected two other bugs) while not being aimed at finding this bug precisely (nor any of the two others). Which, IMO, proves it's a better test (for split logic correctness) than tests that are already present, and better than toy examples.