Some body stopped you from shipping a mistake. Just like when someone stops you to tell you your fly is down or a shoe is untied, feel a little embarrassed, and a little grateful that they didn't let you walk around like that all day.
> feeling bad for honest mistakes.
Use it as an impetus to get better. If you make the same kind of mistake repeatedly how can you modify the way you write code to not do that anymore. There is a popular saying "the worst code I know of is code I wrote six months ago", but if you aren't analyzing and improving (not just changing), then it will be just as true six months from now. Code from the previous month should be better than the code from two months ago and so on, otherwise you are chasing fashion and quality is stagnating.
> feeling bad for honest mistakes.
Use it as an impetus to get better. If you make the same kind of mistake repeatedly how can you modify the way you write code to not do that anymore. There is a popular saying "the worst code I know of is code I wrote six months ago", but if you aren't analyzing and improving (not just changing), then it will be just as true six months from now. Code from the previous month should be better than the code from two months ago and so on, otherwise you are chasing fashion and quality is stagnating.