Build failed with exit code 2

[tejas-hosamani]

Error:

Step 22/35 : RUN chmod u+x /tmp/do_we_need_xdebug.sh && /tmp/do_we_need_xdebug.sh
 ---> Running in 7fea5667aeee
: invalid option
Usage:  /bin/bash [GNU long option] [option] ...
        /bin/bash [GNU long option] [option] script-file ...
GNU long options:
        --debug
        --debugger
        --dump-po-strings
        --dump-strings
        --help
        --init-file
        --login
        --noediting
        --noprofile
        --norc
        --posix
        --pretty-print
        --rcfile
        --restricted
        --verbose
        --version
Shell options:
        -ilrsD or -c command or -O shopt_option         (invocation only)
        -abefhkmnptuvxBCHP or -o option
ERROR: Service 'supervisord' failed to build: The command '/bin/sh -c chmod u+x /tmp/do_we_need_xdebug.sh && /tmp/do_we_need_xdebug.sh' returned a non-zero code: 2

OS: Win 10 64 bit
Using Docker for Windows.

Any idea what's causing this issue?