Sorry for the long delay. I updated my Emacs version to the latest 29 commit and the issue went away. I am no longer able to reproduce it. Thank you for the quick reply and debug though! On Jan 17, 2023 at 1:44 PM -0700, Paul Eggert , wrote: > On 1/16/23 05:16, Eli Zaretskii wrote: > > > char buf[max (sizeof "from..to..in " + 2 * INT_STRLEN_BOUND (EMACS_INT), > > max (sizeof " . #" + INT_STRLEN_BOUND (intmax_t), > > max ((sizeof " with data 0x" > > + (sizeof (uintmax_t) * CHAR_BIT + 4 - 1) / 4), > > 40)))]; > > current_thread->stack_top = buf; <<<<<<<<<<<<<<<<<<<<<<<<<< > > > > If you remove the indicated line, does the crash go away? > > > > If removing that line doesn't help, please tell the dimension of the > > buf[] array that the code above calculates? In GDB, this is possible > > with the command 'ptype'; I don't know what is the lldb equivalent. > > sizeof buf should be 54 on his platform, which I assume has 64-bit > addresses and 64-bit u?intmax_t. > > > > Paul, any ideas or suggestions? > > Unfortunately not. >