ZED crashes, if I try to write a singel "a" in every line, after reaching line 8 and pressing Enter to get to Line 9.

ERROR MSG
Segmentation fault at address 0x0
* /home/max/ZED/src/editor.zig:189:25: 0x22fc4c in insertNewLine (ZED)
* for (row.src[0..f_col]) |c| {
* ^
* /home/max/ZED/src/editor.zig:281:52: 0x2320a2 in processWriting (ZED)
* .enter => return try self.insertNewLine(),
* ^
* /home/max/ZED/src/editor.zig:376:48: 0x234caa in process (ZED)
* .writing => try self.processWriting(key),
* ^
* /home/max/ZED/src/main.zig:28:25: 0x2254d4 in main (ZED)
* try edit.process();
* ^
* /usr/lib/zig/std/start.zig:574:37: 0x224abe in posixCallMainAndExit (ZED)
* const result = root.main() catch |err| {
* ^
* /usr/lib/zig/std/start.zig:243:5: 0x2245a1 in _start (ZED)
* asm volatile (switch (native_arch) {
* ^
* ???:?:?: 0x0 in ??? (???)
* fish: Job 1, './ZED' terminated by signal SIGABRT (Abort)d

Sorry for miss alignment but, thats the way it is in my Terminal.