E: Command line option '7' [from -m755] is not known.

[kherge]

It looks like the install script is bugged?

install.log:

$ umask 022 && mkdir -p "/home/kherrera/.multirust/toolchains/stable/lib/rustlib"
$ echo "3" > "/home/kherrera/.multirust/toolchains/stable/lib/rustlib/rust-installer-version"
install: creating uninstall script at /home/kherrera/.multirust/toolchains/stable/lib/rustlib/uninstall.sh
$ cp /home/kherrera/.multirust/rustup/tmp/tmp-12860-10/rust-1.6.0-x86_64-unknown-linux-gnu/install.sh /home/kherrera/.multirust/toolchains/stable/lib/rustlib/uninstall.sh
install: installing component 'rustc'
$ echo "rustc" >> "/home/kherrera/.multirust/toolchains/stable/lib/rustlib/components"
$ umask 022 && mkdir -p "/home/kherrera/.multirust/toolchains/stable/bin"
install: copying file /home/kherrera/.multirust/toolchains/stable/bin/rust-gdb
$ install -m755 /home/kherrera/.multirust/rustup/tmp/tmp-12860-10/rust-1.6.0-x86_64-unknown-linux-gnu/rustc/bin/rust-gdb /home/kherrera/.multirust/toolchains/stable/bin/rust-gdb
install: error: file creation failed. see logs at '/home/kherrera/.multirust/toolchains/stable/lib/rustlib/install.log'

STDOUT:

multirust: installing toolchain 'stable'
rustup: gpg available. signatures will be verified
rustup: downloading manifest for 'stable'
rustup: downloading toolchain for 'stable'
######################################################################## 100.0%
gpg: Signature made Wed 20 Jan 2016 03:49:50 AM PST using RSA key ID 7B3B09DC
gpg: Good signature from "Rust Language (Tag and Release Signing Key) <rust-key@rust-lang.org>"
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 108F 6620 5EAE B0AA A8DD  5E1C 85AB 96E6 FA1B E5FE
     Subkey fingerprint: C134 66B7 E169 A085 1886  3216 5CB4 A934 7B3B 09DC
rustup: extracting installer
rustup: installing toolchain for 'stable'
install: creating uninstall script at /home/kherrera/.multirust/toolchains/stable/lib/rustlib/uninstall.sh
install: installing component 'rustc'
[sudo] password for kherrera: 
E: Command line option '7' [from -m755] is not known.
install: error: file creation failed. see logs at '/home/kherrera/.multirust/toolchains/stable/lib/rustlib/install.log'
rustup: command failed: sh /home/kherrera/.multirust/rustup/tmp/tmp-12860-10/rust-1.6.0-x86_64-unknown-linux-gnu/install.sh --prefix=/home/kherrera/.multirust/toolchains/stable --disable-ldconfig
rustup: failed to install toolchain

[brson]

This is kinda surprising. What OS are you on; what does uname -a say?

[kherge]

Linux [redacted] 3.13.0-77-generic #121-Ubuntu SMP Wed Jan 20 10:50:42 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

[brson]

Hm, that doesn't reveal much. The problem seems to be that install on your system doesnt support-m775as a flag. Perhaps you can tell if it instead supports--mode=775. What doesinstall --version` say?

[kherge]

After the program exited, I tried to open the install script but the tmp directory does not appear to exist.

The command I run is multirust default stable.

[andrewtj]

@kherge in case it's not clear install is just another executable (like ls, etc). @brson's trying to work out why the install on your system doesn't handle the -m755 flag. The output of install --version, which install and dpkg -S $(which install) might help with that.

[kherge]

Ah, dammit. There was a script in $PATH with the name install that broke the installer.