bug#34910: 27.0.50; Too much matching reentrancy

[Eli Zaretskii]

> From: Mattias Engdegård <mattiase@acm.org>
> Date: Mon, 18 Mar 2019 22:34:07 +0100
> 
> Run, in *scratch*, with emacs -Q:
> 
> (with-temp-buffer
>   (dotimes (i 10000)
>     (insert "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
>   (insert "b")
>   (goto-char (point-min))
>   (looking-at ".*b"))
> 
> 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?

If the former, please explain why you expected that particular
error, and no other.

Thanks.