On Wed, Jan 24, 2018 at 04:15:24PM +0100, [email protected] wrote:
> I found a bug in ksh's parameter expansion on an edge case:
>
> true $(true "${USER#'"'}")
>
> /home/sh[4]: no closing quote
>
> The problem seems to occurs when all of these conditions are present:
>
> 1. On ${var#pattern} or ${var%pattern} parameter expansion
> 2. When the pattern contains a singly quoted double quote: '"'
> 3. While expansion occurs withing $(...), (but not `...`)
> 4. While the expansion is quoted: "${var#pattern}".
As anton@ pointed out, this is known behaviour. The following will work:
true $(true "${USER#\"}")
true $(true "${USER#"\""}")
