GNU bug report logs - #11218
with-demoted-errors use of condition-case-unless-debug; ert

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From: Christian Ohler <ohler <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 11218 <at> debbugs.gnu.org, Glenn Morris <rgm <at> gnu.org>
Subject: bug#11218: with-demoted-errors use of condition-case-unless-debug; ert
Date: Tue, 17 Apr 2012 14:30:58 -0700

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.

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