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Re: W02jobs.ztst: huge delay if output is piped (macOS)

X-seq: zsh-workers 54906
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Re: W02jobs.ztst: huge delay if output is piped (macOS)
Date: Fri, 3 Jul 2026 18:53:18 -0700
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One other thing ... all the "sleep" started under zpty appear to stay running:

% make check TESTNUM=W02 ; ps x
...
   1899 pts/1    Ss     0:11 /usr/local/bin/zsh-5.9.1 -f
 439115 ?        SN     0:00 sleep 3
 439124 ?        SN     0:00 sleep 3
 439133 ?        SN     0:00 sleep 3
 439142 ?        SN     0:00 sleep 3
 439151 ?        SN     0:00 sleep 5
 439152 ?        SN     0:00 sleep 4
 439153 ?        SN     0:00 sleep 3
 439162 ?        SN     0:00 sleep 3
 439171 ?        SN     0:00 sleep 3
 439180 ?        SN     0:00 sleep 3
 439214 ?        SN     0:00 sleep 2
 439225 ?        SN     0:00 sleep 2
 439234 ?        SN     0:00 sleep 2
 439236 ?        SN     0:00 sleep 3
 439246 ?        SN     0:00 sleep 2
 439247 ?        SN     0:00 sleep 3
 439256 ?        SN     0:00 sleep 2
 439257 ?        SN     0:00 sleep 3
 439276 ?        SN     0:00 sleep 2
 439287 ?        SN     0:00 sleep 3
 439298 ?        SN     0:00 sleep 2
 439300 ?        SN     0:00 sleep 3
 439309 ?        SN     0:00 sleep 2
 439310 ?        SN     0:00 sleep 3
 439311 ?        SN     0:00 sleep 4
 439321 ?        SN     0:00 sleep 2
 439322 ?        SN     0:00 sleep 3
 439323 ?        SN     0:00 sleep 4
 439334 ?        SN     0:00 sleep 2
 439335 ?        SN     0:00 sleep 3
 439336 ?        SN     0:00 sleep 2
 439337 ?        SN     0:00 sleep 3
 439366 pts/1    R+     0:00 ps x

Follow-Ups:
- D04 and W02 test oddities.
  - From: Bart Schaefer

References:
- W02jobs.ztst: huge delay if output is piped (macOS)
  - From: Jun T
- Re: W02jobs.ztst: huge delay if output is piped (macOS)
  - From: Mikael Magnusson
- Re: W02jobs.ztst: huge delay if output is piped (macOS)
  - From: Bart Schaefer
- Re: W02jobs.ztst: huge delay if output is piped (macOS)
  - From: Mikael Magnusson

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