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bug#51037: [PATCH] Make `print-level` & `print-length` customizable in E

From: Michael
Subject: bug#51037: [PATCH] Make `print-level` & `print-length` customizable in ERT batch tests
Date: Tue, 12 Oct 2021 06:52:33 -0700
User-agent: mu4e 1.4.15; emacs 28.0.50

If you have very long structures, a simple backtrace can take many
screenfuls, which isn't what most people want or expect.

OK, but I was thinking about a more general problem, not just about ERT. The backtraces displayed in batch-mode are truncated too early,
and that makes them useless many times.

That's true. Programmers that need to debug these things should have an easy way to get complete backtraces, but I don't think users should be presented with them. So perhaps we should just introduce a new switch, like --complete-backtraces (or something) that would do the right thing
both in general and in ert.

Sorry to chime-in late, but my patch does _not_ affect the
printing of backtraces, just results. That said, I do agree with
Eli about the truncated backtraces often being useless; what do
you think of another variable controlling
that... `ert-batch-full-backtraces` or something?

Michael <sp1ff@runbox.com>

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