Re: [PATCH 4/7] completion: add tests for invalid variable name among completion words

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SZEDER Gábor wrote:

>                                                      The breakage can
> be simply bogus possible completion words, but it can also be a
> failure:
>
>   $ git branch '${foo.bar}'
>   $ git checkout <TAB>
>   bash: ${foo.bar}: bad substitution

Or arbitrary code execution:

	$ git branch '$(>kilroy-was-here)'
	$ git checkout <TAB>
	$ ls -l kilroy-was-here
	-rw-rw-r-- 1 jrn jrn 0 nov 17 15:40 kilroy-was-here

The final version of this patch should go to maint.  Thanks for
catching it.
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