bug#44942: 28.0.50; Emacs should print a backtrace on uncaught errors in batch mode

[Philipp Stephani]

Am So., 29. Nov. 2020 um 11:48 Uhr schrieb Philipp Stephani
<p.stephani2@gmail.com>:
>
>
> $ emacs -Q -batch -eval '(progn (defun foo () (error "Boo")) (foo))'
> Boo
>
> Emacs should print a backtrace here to make it possible to debug such
> errors.  It's possible to force Emacs to print a backtrace by binding
> `debug-on-error', however, that is incorrect because it changes the
> meaning of `with-demoted-errors' and `condition-case-unless-debug',
> causing code that would normally work to fail with an error.  Instead,
> `signal' should print a backtrace if in batch mode and if it jumps to
> the top-level error handler.  It looks like this logic could be
> special-cased in signal_or_quit, similar to the debugger logic.
>


I've attached a patch.

0001-Print-a-backtrace-on-unhandled-errors-in-batch-mode-.patch
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