Here's a similar crash from emacs 25.

On Tue, Dec 8, 2015 at 1:03 PM John Wiegley <jwiegley@gmail.com> wrote:
>>>>> Eli Zaretskii <eliz@gnu.org> writes:

>> $7 = (struct Lisp_Cons *) 0x6c20736c69747560
>> Cannot access memory at address 0x6c20736c69747560

> That "address" is part of a string: "`utils l" (without the quotes). So I'm
> guessing some code is overwriting the stack or writing beyond the limits of
> a char array. The question is where?

Nice catch! Forgot to look for that.

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