Comment 5 for bug 61463

Complain to the script authors who are making the mistake. Dash has been a viable provider of /bin/sh (by way of debconf on the dash package) for a long time. There are other shells that provide 'sh' functionality too. If a script really requires /bin/bash then it needs to start with #!/bin/bash.

Analogy: If I needed a square, I would not ask you for a rectangle. Although you might give me the square that I need, since that would fulfill my stated rectangle requirements, it is not guaranteed.

People who need /bin/bash should not ask for /bin/sh and hope that the result they get just happens to be /bin/bash. I have used dash as my /bin/sh for over a year now. It is insanely faster, especially for huge shell scripts such as 'configure' in large projects.