SHELL: parameter not set when installing via rustup on Ubuntu 14.04.2 LTS in Docker

[shepmaster]

To reproduce:

$ docker run -it ubuntu /bin/bash
# apt-get install curl
# curl -sSf https://static.rust-lang.org/rustup.sh | sh

The error corresponds to this line in the Rust configure script. Let me know if this issue more properly belongs in that repository and I'll move it.

[shepmaster]

A workaround is to set the value of SHELL:

$ export SHELL=/bin/bash

[abarbarov]

this works for me:

$ curl -sSf https://static.rust-lang.org/rustup.sh | /bin/bash -s -- --yes