An alias to "execute task-*" confuses task

[madduck]

Using task 2.6.0 (at commit 51a5a73c0, but also on the master branch), the following command:

task rc.alias.attach='execute task-attach' attach …

really confuses task, which seems to handle the task-* prefix specially. According to strace, the above results in the following call:

[pid 25304] execve("/bin/sh", ["sh", "-c", "- task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - execute task - attach 33"], 0x7ffd7da8e000 /* 56 vars */) = 0

Using task_attach works, as does anything-else.

Note that using anything-doesnotexist actually causes task to attempt to evaluate the expression:

~/.bin% task rc.alias.test='execute task-nonexistent' test
[task next ( - nonexistent )]
Cannot subtract strings
Configuration override rc.alias.test:execute task-nonexistent
~/.bin% task rc.alias.test='execute foo-nonexistent' test 
sh: 1: foo: not found
Configuration override rc.alias.test:execute foo-nonexistent

[pbeckingham]

Good find, thanks.

[tbabej]

Reproduced on 2.6.0.