Fix discrepancy between mergeWithKey impl and docs #1025
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treeowl
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Aug 13, 2024
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I suppose this does cause a change in behavior. Updated the changelog in case someone is affected.
Personally I'm not too keen on seeing it gone. It is unsafe but can be used properly. I wish it were maybe exported from "Data.Map.Unsafe" or something like that. |
Don't call the `only2` function on empty trees. Fixed for both Map and IntMap.
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The given functions should be called only on nonempty trees.
Fixes #979.
This could alternately be fixed by changing the docs. I find it slightly better to keep the specification that the user will not receive an empty tree.