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Re: $var not expanded in ${x?$var}

X-seq: zsh-workers 51304
From: "Daniel Shahaf" <d.s@xxxxxxxxxxxxxxxxxx>
To: "Stephane Chazelas" <stephane@xxxxxxxxxxxx>, "Zsh hackers list" <zsh-workers@xxxxxxx>
Subject: Re: $var not expanded in ${x?$var}
Date: Mon, 16 Jan 2023 08:35:54 +0000
Archived-at: <https://zsh.org/workers/51304>
Feedback-id: i425e4195:Fastmail
In-reply-to: <20230113080246.nghigc4givvaomve@chazelas.org>
List-id: <zsh-workers.zsh.org>
References: <20230113080246.nghigc4givvaomve@chazelas.org>

Stephane Chazelas wrote on Fri, 13 Jan 2023 08:02 +00:00:
> $ zsh -c 'echo ${1?$USERNAME}'
> zsh:1: 1: $USERNAME
>
> No quote removal either:
>
> $ zsh -c 'echo ${1?"x"}'
> zsh:1: 1: "x"
>

Thanks for the report.

> (also note that line number being printed twice)

No, it's not.  The second "1" is the parameter name:

$ zsh -fc 'echo ${foo?$USERNAME}' 
zsh:1: foo: $USERNAME

Cheers,

Daniel

References:
- $var not expanded in ${x?$var}
  - From: Stephane Chazelas

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