Comment 9 for bug 127399

Update: this has nothing to do with python.

If I put

command_not_found_handle() {
    ls
}

into /etc/bash_command_not_found or something similar.

And run

foobar &

bash will crash also (from time to time).

When handler contains only bash internals (echo ...), the crashes won't happen. This has something to do with forking ...