I have found the minimum necessary to consistently reproduce.  copy/paste
this into *something.c* to see if you get same results:

void *AVL_first(AVL_t *);
void *AVL_last(AVL_t *);
#define (<--- locks up with pressing open parenthesis

Thanks


On Thu, Jan 24, 2019 at 8:53 AM Michael Menefee <mpmenefee@gmail.com> wrote:

> Hi,
>
> I narrowed it down to a "#define anything(" as the last line in the buffer
> will consistently lock up for me.  I'm sure it's the c mode not resolving
> something right.  I will experiment more and send you the results if I can
> reproduce with minimal buffer content.
>
> Thanks
>
> On Thu, Jan 24, 2019, 8:46 AM Eli Zaretskii <eliz@gnu.org wrote:
>
>> > From: Michael Menefee <mpmenefee@gmail.com>
>> > Date: Wed, 23 Jan 2019 10:24:09 -0600
>> >
>> > Editing a C header file, I type
>> > '#define AVL_iter(' and it locks up consistently and has to be killed
>> > from another terminal, with CPU at 100%.
>>
>> I cannot reproduce this.  Does the buffer contain anything else in
>> addition to the text you've shown?  Does it happen in "emacs -Q"?
>>
>> I invoked "emacs -Q", then typed
>>
>>   C-x C-f headerhang.h
>>   #define AVL_iter(
>>
>> At that point, Emacs was responsive as I'd expect.  Are you doing the
>> same to reproduce the problem?
>>
>> Thanks.
>>
>