Update repro with correct model & print
Usage to get a repro w/ stacktrace:
0. search for `ipt(` in test_prims_nvfuser_e2e.py and uncomment
1. python test/test_prims_nvfuser_e2e.py
2. wait for "Type something..."
3. Start gdb on the python process
4. Go back to the "Type something..." prompt and type something & enter to continue
5. Wait until gdb catches the segfault and you can see the backtrace with `bt`.
