On Sat, Dec 28, 2013 at 3:56 AM, Lee Spector <lspec...@hampshire.edu> wrote:

>
> On Dec 27, 2013, at 11:33 PM, guns wrote:
>
> > On Fri 27 Dec 2013 at 11:23:22PM -0500, Lee Spector wrote:
> >>
> >> On Dec 27, 2013, at 11:18 PM, guns wrote:
> >>>
> >>> (defmacro dump-locals [] ...
> >>> `
> >> When and where do you call this?
> >
> > I call this inside of the closest function that raised the exception.
>
> Ah, so you have to see an exception, edit your code to include a call to
> this, re-run, and get to the same exception.
>
> So it will only help for exception-raising situations that are easy to
> repeat, which mine often are not.
>

It helps to go with the "functional, immutable" flow, in which case if you
get an unwanted exception it should *usually* have bubbled up from some
failing test. Add a dump-locals where suggested by the stack trace and
rerun the failing test and voila! That should do it for almost all
non-exogenous exceptions, leaving mainly things like network timeouts and
other wonkiness caused by factors outside of your code (and, often, outside
of your control anyway).

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