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From: Vishal Verma <vishal@kernel.org>
Newsgroups: gnu.bash.bug
Subject: Re: TAB completion of filenames beginning with colon is broken
Date: Thu, 13 Jun 2019 10:54:51 -0600
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On Thu, 2019-06-13 at 16:56 +1000, Jason Tyler wrote:
> Configuration Information [Automatically generated, do not change]:
> Machine: x86_64
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS: -g -O2 -fdebug-prefix-map=/build/bash-LQgi2O/bash-5.0=.
> -fstack-protector-strong -Wform$
> uname output: Linux jpt 5.0.0-16-generic #17-Ubuntu SMP Wed May 15 10:52:21
> UTC 2019 x86_64 x86_64 x86_64 G$
> Machine Type: x86_64-pc-linux-gnu
> 
> Bash Version: 5.0
> Patch Level: 3
> Release Status: release
> 
> Description:
> if a filename begins with ":", then tab completion will turn the colon into
> ":\:"
> 
> Repeat-By:
> touch ./:
> type "ls :<TAB>" to have the command completed to "ls :\:"

Known/expected behavior - this is described in 'E13' of Chet's Bash
FAQ[1]

[1]: https://tiswww.case.edu/php/chet/bash/FAQ