bug#10483: [PATCH] cperl-mode: Avoid endless loop

[Harald Jörg]

On 8/31/20 7:24 PM, Eli Zaretskii wrote:
>> From: Harald Jörg <haj@posteo.de>
>> Date: Mon, 31 Aug 2020 19:06:08 +0200
>>
>> That bug has a few more manifestations. An endless loop
>> occurred whenever a statement ended in a closing paren, and
>> the statement was not terminated on the same line.
> 
> Thanks, but could we please also have a test for this issue, so that
> the bug never happens again?

Sure... I can prepare another patch.  The test also ought to verify
that terminating the while loop didn't damage cperl-mode's ability to
indent the compound statements it handles in this section of code.

I was hesitating in this particular case because _if_ this issue ever
happens again, then the test just hangs forever.

Is there a safeguard against this?
--
Cheers,
haj