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Re: Unset during expansion w/ nofork sub
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From: |
Chet Ramey |
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Subject: |
Re: Unset during expansion w/ nofork sub |
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Date: |
Thu, 25 May 2023 09:29:21 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 |
On 5/24/23 9:45 AM, Grisha Levit wrote:
There are a lot of code paths that (reasonably) do not expect a variable to
disappear while being expanded/assigned to, and usually cause a segfault if
that happens (as is now possible with the new nofork command substitution).
I don't think there is any legitimate use case to be supported here, and I
can't really think of a sensible way to avoid this without adding a bunch
of overhead.
Right now, I think the best guidance is "don't do that."
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/