bug#11218: with-demoted-errors use of condition-case-unless-debug; ert

[Christian Ohler]

On 4/13/12 6:44 AM, Stefan Monnier wrote:
> > > > If you replace with-demoted-errors with ignore-errors, the test passes.
> > > Looks like a bug in ERT.
> > I don't know if it's a "bug" per se...
> > ert--run-test-internal binds debug-on-error to t, and redefines the
> > debugger to ert--run-test-debugger. As the doc of that function says:
>
> I wonder why ERT doesn't just use condition-case to catch and record
> the errors.

Two reasons that I remember off the top of my head: Recording 
backtraces, and recording additional information provided with 
`ert-info'.  Using condition-case would let ERT regain control only 
after the stack is unwound, at which point that information is gone.

Christian.