Re: line numbers in error messages are off wrt debuggers

Hi,

On 2018-06-20 12:12:26 -0400, Tom Lane wrote:
> Andres Freund <andres(at)anarazel(dot)de> writes:
> > I'm fairly frequently annoyed that when I see an error message in the
> > log, I can't just generally set a breakpoint on the included line
> > number. That's because the line number in the error message is from the
> > *end* of the message:
>
> IME it varies depending on which compiler you use; some report the line
> where the ereport is. So I'm doubtful that there's going to be much we
> can do about it. Probably this behavior is bound up with macro expansion
> vs. just when __LINE__ is expanded.
>
> (No, I won't hold still for a coding requirement that all ereport calls
> be smashed onto a single line ;-))

Hah, me neither ;)

> Personally, my habit is to set the breakpoint at errfinish, which works
> independently of just where the call is.

I do that too, occasionally. Doesn't really if there's a lot of error
messages before the bug you're waiting for happens though.

Greetings,

Andres Freund