bug#34910: 27.0.50; Too much matching reentrancy

[Mattias Engdegård]

19 mars 2019 kl. 09.05 skrev Eli Zaretskii <eliz@gnu.org>:
> 
>> Result: "Too much matching reentrancy" in the minibuffer. No traceback.
>> Expected: The usual "Stack overflow in regexp matcher" error and
>> traceback.
> 
> Are you complaining against a different error message, or against the
> lack of backtrace?

Both. In fact, a gdb-level stack trace indicates that the "too much reentrancy" 
error was signalled when trying to deal with the stack overflow error somehow. 
I didn't get further then, and thought that Daniel Colascione would know more, 
since bisecting found his particular change.

The should be no question that "stack overflow" + debugger is the correct and 
intended behaviour, should it?