I'm scared, there's a problem with the Mac bash.

As a result of personal brain mutilation, using homebrew to install bash, use the CHSH command to change it to a specific version of the Brew installation bash, and after the last brew update bash, the shell is completely useless ...

Helpless can only add a new administrator account and then change the original account of the default shell back, this event told me, do not make it clear before, do not be hot to do some superfluous things.

At the same time also understand BSD, MacOS,/etc/passwd is not stored user shell and other information;

If you want to change to homebrew installed bash, you should not add a specific version of Bash, but should add a fixed location link:/usr/local/bin/bash;

Ways to change the shell of another account: sudo chsh-s/bin/bash username

I'm scared, there's a problem with the Mac bash.