Bash syntax errors reported when loading cargo shell completions

[jimmycuadra]

Problem

The cargo command completion shell script produces syntax errors when loaded:

-bash: /redacted/.rustup/toolchains/stable-x86_64-apple-darwin/etc/bash_completion.d/cargo: line 82: syntax error in conditional expression: unexpected token `('
-bash: /redacted/.rustup/toolchains/stable-x86_64-apple-darwin/etc/bash_completion.d/cargo: line 82: syntax error near `@(t'
-bash: /redacted/.rustup/toolchains/stable-x86_64-apple-darwin/etc/bash_completion.d/cargo: line 82: `		if [[ "${cmd}" = @(test|bench) ]]; then'

Steps

1. Install latest rustup. I'm using rustup 1.18.0 (8603e2c 2019-04-22).
2. Run source $(rustc --print sysroot)/etc/bash_completion.d/cargo in a shell.
3. Observe output.

Possible Solution(s)

Notes

Output of bash --version:
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.

Output of rustup --version: rustup 1.18.0 (8603e2c 2019-04-22)

[kinnison]

Hi, the completions come from Cargo rather than rustup itself, this is probably better filed against rust-lang/cargo

[rbtcollins]

Fixed in rust-lang/cargo#6905