It's not pretty. Luckily a few feet away the rafter is supported by a post which is in turn supported by a beam.

Without knowing what is on the other side of the rafter it's hard to say what the loads are at the end of the rafter. It would have been nice if the framers had at least nailed a block between the joists below the 2X4 for additional support.

It is certainly questionable. Hard to say whether to recommend a repair without knowing more.

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"Baseball is like church. Many attend but few understand." Leo Durocher
Bruce Breedlove
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