FeatureUnion not working when aggregating data and pandas transform output selected Describe the bug

FeatureUnion not working when aggregating data and pandas transform output selected Describe the bug: a task in Lego-RL-SWE-Bench-Verified (Harbor dataset). I would like to use pandas transform output and use a custom transformer in a feature union which aggregates data. When I'm using this…

The task

I would like to use `pandas` transform output and use a custom transformer in a feature union which aggregates data. When I'm using this combination I got an error. When I use default `numpy` output it works fine.

Part of Lego-X/Lego-RL-SWE-Bench-Verified.