bug#40088: 27.0.90; Symbol’s value as variable is void: debugger-outer-match-data

[Noam Postavsky]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Noam Postavsky <npostavs@gmail.com>
>> Cc: michael_heerdegen@web.de,  joostkremers@fastmail.fm,
>>   40088@debbugs.gnu.org,  monnier@iro.umontreal.ca
>> Date: Sun, 22 Mar 2020 23:17:06 -0400
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > It sounds like a very basic error.  How come we never saw it before?
>> > Is it just luck?
>> 
>> Like I said, the debug.el code changed in Emacs 27 so that the bug can
>> be triggered more often.
>
> Is this code used only in debug.el?

Actually, the call to backtrace--locals moved from debug.el to the new
file backtrace.el (via backtrace-get-frames).  edebug.el and ert.el call
backtrace-get-frames too.