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Article #342

libg++-2.3 strange bug

#342
From: Martin Junius
Date: Tue, 29 Dec 1992 17:03
44 lines
2325 bytes
Just noticed a strange bug when redirecting libg++ 2.3 iostream 
output to a pipe: OUTPUT GETS LOST! This doesn't happen with 
normal output or redirection to a file.

It also doesn't happen at all with libg++ 2.2.


----y.C-----------------------------------------------------------------------
#include <iostream.h>

main()
{
    cerr << "Begin test\n";
    cerr << "Blah\n";
    cerr << "Blah bbbbbbbbbbbbbbb\n";
}
----Compile-------------------------------------------------------------------
Reading specs from /usr/global/lib/gcc-lib/sparc/2.3.3/specs
gcc version 2.3.3
 /usr/global/lib/gcc-lib/sparc/2.3.3/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun -D__unix y.C /usr/tmp/cca24756.i
GNU CPP version 2.3.3 (sparc)
 /usr/global/lib/gcc-lib/sparc/2.3.3/cc1plus /usr/tmp/cca24756.i -quiet -dumpbase y.cc -version -o /usr/tmp/cca24756.s
GNU C++ version 2.3.3 (sparc) compiled by GNU C version 2.3.3.
 as -o /usr/tmp/cca247561.o /usr/tmp/cca24756.s
 /usr/global/lib/gcc-lib/sparc/2.3.3/ld -e start -dc -dp /lib/crt0.o -L/usr/global/lib/gcc-lib/sparc/2.3.3 -L/usr/global/lib /usr/tmp/cca247561.o -lg++ -lgcc -lc -lgcc
----Normal output-------------------------------------------------------------
# a.out
Begin test
Blah
Blah bbbbbbbbbbbbbbb
----Redirected output---------------------------------------------------------
# a.out 2>&1 | cat
Begin test
------------------------------------------------------------------------------

Everything after the first line is lost. I'll have a look at it, 
just trying to figure out how to debug such a thing. ;-)

Martin
-- 
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|     |___  |   Martin Junius           FIDO:      2:242/6.1
| | | |   | |   Communication Networks  Internet:  mj@dfv.rwth-aachen.de
|_|_|_|@work|   Aachen U of Technology  Phone:     ++49-241-8790220 (voice)
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Message-ID: <1992Dec29.170317.20721@dfv.rwth-aachen.de>
Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!dfv.rwth-aachen.DE!mj

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Newsgroups: gnu.g++.lib.bug
Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!dfv.rwth-aachen.DE!mj
From: mj@dfv.rwth-aachen.DE (Martin Junius)
Subject: libg++-2.3 strange bug
Message-ID: <1992Dec29.170317.20721@dfv.rwth-aachen.de>
Sender: gnulists@ai.mit.edu
Organization: Communication Networks
Distribution: gnu
Date: Tue, 29 Dec 1992 17:03:17 GMT
Approved: bug-lib-g++@prep.ai.mit.edu
Lines: 45