Wrong shebang

[mcandre]

The Rustup shell script is not fully POSIX compliant, but rather uses bashisms like local-scoped variables. When users attempt to run the rustup install script on different UNIX systems, they often get errors about missing local files/directories.

To fix this, either set the shebang to #!/bin/bash, or rewrite the script to avoid bashisms (checkbashisms can assist this process).

[Diggsey]

Fixed by #1269