grammar - "I wish I had not done something" vs "I wish I would not have done something"

Tell me please if there is any difference between the following sentences?

I wish I hadn't dropped out of college.

I wish I wouldn't have dropped out of college.

I didn't know that the latter structure existed till I came across this example

He wishes he would’ve checked for his wallet before leaving, but he realized that hindsight is 20/20

on this site.