.status = 99
status = 127
.pids [801, 802]
job_ids [1, 2]
i=8
i=9
.pids [805, 806, 808]
job_ids [1, 2, 3]
i=7
i=8
i=9
.pids [811, 812]
job_ids [1, 2]
i=8
i=9
.pids [815, 816, 818]
job_ids [1, 2, 3]
i=7
i=8
i=9
..(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
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        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
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      right:<Right_Subshell ")">
      is_last_cmd:F
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pipelines [<Pipeline pgid=-1 pids=[821, 822, 823] state=Running procs=[<Process pid=821 state=Running [subprog] Simple>, <Process pid=822 state=Running [subprog] Simple>, <Process pid=823 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[825, 826, 827] state=Running procs=[<Process pid=825 state=Running [subprog] Simple>, <Process pid=826 state=Running [subprog] Simple>, <Process pid=827 state=Running [subprog] Subshell>]>]
job_ids [1, 2]
(command.Pipeline
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(command.Pipeline
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      right:<Right_Subshell ")">
      is_last_cmd:F
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
.(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
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      is_last_cmd:F
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
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(command.Pipeline
  children:[
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      right:<Right_Subshell ")">
      is_last_cmd:F
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
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      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
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      right:<Right_Subshell ")">
      is_last_cmd:F
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
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(command.Pipeline
  children:[
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      is_last_cmd:F
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(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
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      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
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      right:<Right_Subshell ")">
      is_last_cmd:F
    )
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
pipelines [<Pipeline pgid=-1 pids=[829, 830, 831] state=Running procs=[<Process pid=829 state=Running [subprog] Simple>, <Process pid=830 state=Running [subprog] Simple>, <Process pid=831 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[833, 834, 835] state=Running procs=[<Process pid=833 state=Running [subprog] Simple>, <Process pid=834 state=Running [subprog] Simple>, <Process pid=835 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[837, 838, 839] state=Running procs=[<Process pid=837 state=Running [subprog] Simple>, <Process pid=838 state=Running [subprog] Simple>, <Process pid=839 state=Running [subprog] Subshell>]>]
job_ids [1, 2, 3]
.(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
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      is_last_cmd:F
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  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
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    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
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(command.Pipeline
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(command.Pipeline
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pipelines [<Pipeline pgid=-1 pids=[841, 842, 843] state=Running procs=[<Process pid=841 state=Running [subprog] Simple>, <Process pid=842 state=Running [subprog] Simple>, <Process pid=843 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[845, 846, 847] state=Running procs=[<Process pid=845 state=Running [subprog] Simple>, <Process pid=846 state=Running [subprog] Simple>, <Process pid=847 state=Running [subprog] Subshell>]>]
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Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
.Broken pipe (core dumped)
(command.Pipeline
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pipelines [<Pipeline pgid=-1 pids=[849, 850, 851] state=Running procs=[<Process pid=849 state=Running [subprog] Simple>, <Process pid=850 state=Running [subprog] Simple>, <Process pid=851 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[853, 854, 855] state=Running procs=[<Process pid=853 state=Running [subprog] Simple>, <Process pid=854 state=Running [subprog] Simple>, <Process pid=855 state=Running [subprog] Subshell>]>, <Pipeline pgid=-1 pids=[857, 858, 859] state=Running procs=[<Process pid=857 state=Running [subprog] Simple>, <Process pid=858 state=Running [subprog] Simple>, <Process pid=859 state=Running [subprog] Subshell>]>]
job_ids [1, 2, 3]
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.Broken pipe (core dumped)
      1 7
      1 Makefile
      1 Vagrantfile
      1 _build
      1 _devbuild
      1 _gen
      1 _release
      1 _test
      1 _tmp
      1 asdl
      1 benchmarks
      1 bin
      1 build
      1 builtin
      1 client
      1 configure
      1 core
      1 cpp
      1 data_lang
      1 demo
      1 deps
      1 devtools
      1 display
      1 doc
      1 doctools
      1 frontend
      1 install
      2 md
      1 metrics
      1 mycpp
      1 ninja
      1 nix
      1 opy
      1 osh
      1 pea
      1 pgen2
      1 prebuilt
      1 pyext
      1 pylib
      1 regtest
      2 sh
      6 so
      1 soil
      1 spec
      1 stdlib
      1 test
      1 testdata
      1 tools
      1 trees
      5 txt
      1 uninstall
      1 vendor
      1 web
      1 win32
      1 yaks
      1 ysh
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
Broken pipe (core dumped)
pipe_status: [-1, -1, -1, 0]
.INSTALL-old
INSTALL
LICENSE
Makefile
NINJA-config
Python-2
README-index
README-native
README
Vagrantfile
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('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
Vagrantfile
README.md
README-native.txt
README-index.md
Python-2.7.13
NINJA-config.sh
Makefile
LICENSE.txt
INSTALL.txt
INSTALL-old.txt
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(command.Pipeline
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(command.Pipeline
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('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
[-1, -1, -1, 0]
testpipeline
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('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
[-1, -1, -1, 0]
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(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
[-1, -1, -1, 0]
testpipeline
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
[-1, -1, -1, 0]
Sat Dec 13 19:46:04 UTC 2025
date returned 0
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.09>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 9>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.08>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 8>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
(command.Pipeline
  children:[
    (C (w <Lit_Chars sleep>) (w <Lit_Chars 0.07>))
    (C (w <Lit_Chars cat>))
    (command.Subshell
      left:<Op_LParen "(">
      child:(command.ControlFlow
        keyword:<ControlFlow_Exit exit>
        arg_word:(w <Lit_Number 7>)
      )
      right:<Right_Subshell ")">
      is_last_cmd:F
    )
  ]
  ops:[<Op_Pipe "|"> <Op_Pipe "|">]
)
('BEFORE', ['0', '1', '2', '3', '4'])
('AFTER', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
ls | cut -d . -f 1 | head
[-1, -1, 0]
[-1, -1, -1, 0]
('FDS BEFORE', ['0', '1', '2', '3', '4'])
------------------------------------------------------------
date
----------------------------[??? no location ???] Can't execute 'does-not-exist': No such file or directory
..
----------------------------------------------------------------------
Ran 18 tests in 0.729s

OK
--------------------------------
does-not-exist
127
('FDS AFTER', ['0', '1', '2', '3', '4'])