You said: "…[I] wonder if I should keep my mistakes to myself" You know your code is buggy, that's not an honest mistake. So fix it, don't hide it. --- BTW,

You said: "…[I] wonder if I should keep my mistakes to myself" You know your code is buggy, that's not an honest mistake. So fix it, don't hide it. --- BTW, I don't agree with how your manager told you that.