On Friday, December 26, 2014 2:56:05 PM UTC-8, Dave S wrote: > > > > On Monday, December 22, 2014 4:45:05 PM UTC-8, Alex Glaros wrote: >> >> I searched the error ticket for traces for table name, line number, but >> couldn't see any connection to anything regarding the real error (which I >> knew) >> > > The easy bugs are the ones that break right where the mistake is. Not all > bugs are that polite. > > If the problem is occurring due to recent code changes, then you can use > your source control bisection tools to track down which version introduced > the problem. That helps to focus you on what is *usually* the right > area. I say "usually", but sometimes the change doesn't *introduce* the > bug, it merely *uncovers* it. > > When things break because a bug is uncovered, it's usually hiding in old > code that you thought was working just fine. And it was, until the planets > aligned to produce just the precise input, or traffic on the highway hit > just the right speed to put the race cars in contention. About all you can > do for these bugs is look at where the break occurred, and try to determine > what assumptions are being made, and what code is responsible for enforcing > those assumptions. Also, bring along some dice and use the rolls to pick a > line number to look at. > > Note that print/log statements often help, as do debuggers, but they do > change what is happening and can alter the sequence, and can make a bug > disappear before you tag it. >
I'd add assertion-type code to that list, although their effect on timing and such is usually less dramatic. > At least, that's my thoughts on the subject at the moment, shooting from > the hip on a day off. > > /dps > that's me -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
