I often hear (or read) a construct along the lines of "I wish I would have ". Here is a recent example:
I wish I would have written a post guessing at Facebook’s new name [...]
This wish-I-would-have form has never sounded correct to my ear; I would only ever say "I wish I had written..." in this case. I've always believed it to be a sort of subjunctive formation (?) error, but it's so common I'd like some definitive ruling on it or further context.
If it's not considered grammatical, why is it so common? Is it a valid dialect or regionalism?
There are other questions on here that deal with adjacent or similar forms but I'm not sure they address this simple question squarely: I'm not asking about when "would-have" could be used, just whether it's correct here. Thanks!