[ expect-Bugs-1279388 ] broken pipe with more introduced in expect-5.43, 5.41 works.

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[ expect-Bugs-1279388 ] broken pipe with more introduced in expect-5.43, 5.41 works.

SourceForge.net
Bugs item #1279388, was opened at 2005-09-01 07:39
Message generated for change (Settings changed) made by hobbs
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=113179&aid=1279388&group_id=13179

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Resolution: None
>Priority: 7
Submitted By: Claudio Fontana (sick_soul)
>Assigned to: Andreas Kupries (andreas_kupries)
Summary: broken pipe with more introduced in expect-5.43, 5.41 works.

Initial Comment:
Hello,
there seems to be a bug introduced in expect-5.43,
where standard output can not be piped to more anymore.

Here is my test and the answer on my system (GNU/Linux
Slackware 10.1, customized, Kernel 2.6.12 on Intel P4):

--------test.tcl--------
set biglist [list somestring somethingelse]

for { set i 0 } { $i < 50 } { incr i } {
    lappend biglist more_stuff
}

foreach element $biglist {
    puts $element
}
-------------------------

# now use expect 5.41 as interpreter and pipe output
through more

$ /usr/bin/expect
expect1.1> exp_version
5.41.0
expect1.2> exit

$ /usr/bin/expect test.tcl | more

somestring
somethingelse
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
--More--
...

# now test using expect-5.43 as interpreter and pipe
through more

$ /home/claudio/usr/bin/expect
expect1.1> exp_version
5.43.0
expect1.2> exit

$ /home/claudio/usr/bin/expect test.tcl | more
...
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
more_stuff
error writing "stdout": broken pipe
    while executing
"puts $element"
    ("foreach" body line 2)
    invoked from within
"foreach element $biglist {
    puts $element
}"
    (file "test.tcl" line 7)

----------------------------------------------------
This error does not always happen, sometimes I get five
or more clean runs before getting the broken pipe.

Repeated runs with expect-5.41 never show the error.


----------------------------------------------------------------------

Comment By: Claudio Fontana (sick_soul)
Date: 2005-09-05 01:48

Message:
Logged In: YES
user_id=790036

ERRATA: add

"package require Expect"

at the beginning of the script to obtain the error described.

----------------------------------------------------------------------

You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=113179&aid=1279388&group_id=13179


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