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In-Reply-To: <20160621193918.GA3768@fau.de>
References: <20160621193918.GA3768@fau.de>
Date: Tue, 21 Jun 2016 13:18:21 -0700
Message-ID: <CAH+w=7YdV_LFUghpueqbjRHWyhzEA8iDarE=FGG1BSk2Fr+s0w@mail.gmail.com>
Subject: Re: bug: suffix alias and tabcompletion
From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh hackers list <zsh-workers@zsh.org>
Cc: Michael Gebhard <michael.gebhard@fau.de>
Content-Type: text/plain; charset=UTF-8

On Tue, Jun 21, 2016 at 12:39 PM, Michael Gebhard
<michael.gebhard@fau.de> wrote:
>
> running the following commands and trying to complete the last line
> by pressing tab produces a zsh taking up 100% cpu.
>
> zsh -f
> touch foo.bar
> alias -s bar='echo a &'

It's not (just) completion; attempting to run the command "foo.bar"
produces a similar infinite loop.  The alias has expanded to "echo a &
foo.bar" which then recursively expands "foo.bar" (because after the
"&" it is in command position again) and off we go.  The "touch
foo.bar" isn't required.

Normal aliases have a safeguard against the alias calling itself
recursively, but that must have been overlooked with suffix aliases.