Zsh Mailing List Archive
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Re: Possible bug: Zsh function does not terminate when ${name:?word} fails

> This seems to be a side effect of the reserved word handling, if you do
> disable -r local
> then it behaves as expected. 

I don't think this would be a good idea. If I understand correctly, this
would make the variables global (with all consequences from a name
clash). There are other nasty consequences too.

A better workaround is IMO to separate parameter check and assignment,
for instance by

: ${foo:?hello}
local p=$foo # foo is guaranteed to have a value here

Ronald
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