Some more detective work:

(gdb) p _width
$4 = 480
(gdb) p lineWidth
$5 = 0
(gdb) p _x
$6 = 12194464
(gdb)

That's a very large coordinate for a 640x480 screen.

Looks like I got the same assertion while skipping a line of dialog in the computer screen in Don's office as well. residual: ./common/str.h:185: char Common::String::operator[](int) const: Assertion `_str && idx >= 0 && idx < (int)_size' failed. Program received signal SIGABRT, Abor...

In order to make residual run Grim for me, I had to change the size of the English grim.tab to 362164 in detection.cpp. It might be because I'm not running a patched version, perhaps? Also, I started playing through the game from the start, and ran into an assertion error at the end of the movie ent...