fix: Coerce two FnDefs to fn pointers even if they are the same, if they are subtypes
#18633
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… are subtypes That's because they can be the same function but still different substs, which mandates them to coerce to fn pointers in order to unify.
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Dec 8, 2024
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That's because they can be the same function but still different substs, which mandates them to coerce to fn pointers in order to unify.
Fixes #18626.