libstdc++/6745: Sever io problems on branch rdbuf

[peter@snake.iap.physik.tu-darmstadt.de]

>Number:         6745
>Category:       libstdc++
>Synopsis:       Sever io problems on branch rdbuf
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 20 09:56:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Peter Schmid
>Release:        3.1.1 20020519 (prerelease)
>Organization:
TU Darmstadt
>Environment:
System: Linux kiste 2.4.18 #8 Sat Mar 9 15:33:15 CET 2002 i686 unknown
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads=posix --enable-languages=c,c++,f77,objc
>Description:
There are severe io related problems on the branch. I believe those
problems are related to the recent check-ins. For example, consider
the following code tc.C. When run interactively, typing ^D on the
keyboars has no effect, the program does not finish. When the input
and output file descriptors are redirected to files, the programm does not
terminate either. There are other io related problems I have not yet
investigated. For example, when running the boost regression suite,
the output of the html status file, cs-linux.html, is
truncated. "libs/config/test/config_info.cpp run" is the last line
(the first test of the regression suite), though all tests pass. 


>How-To-Repeat:
source code tc.C

#include <iostream>

int main ()
{
    std::cout << std::cin.rdbuf();
}

g++ -v -o tc tc.C -W -Wall
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/specs
Configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads=posix --enable-languages=c,c++,f77,objc
Thread model: posix
gcc version 3.1.1 20020519 (prerelease)
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=1 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ tc.C -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase tc.C -W -Wall -version -o /tmp/ccPq221W.s
GNU CPP version 3.1.1 20020519 (prerelease) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1.1 20020519 (prerelease) (i686-pc-linux-gnu)
	compiled by GNU C version 3.1.1 20020519 (prerelease).
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/g++-v3
 /usr/local/include/g++-v3/i686-pc-linux-gnu
 /usr/local/include/g++-v3/backward
 /usr/local/include
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/include
 /usr/include
End of search list.
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/../../../../i686-pc-linux-gnu/bin/as -V -Qy -o /tmp/ccd2RdDf.o /tmp/ccPq221W.s
GNU assembler version 020428 (i686-pc-linux-gnu) using BFD version 020428 20020428
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/collect2 --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o tc /usr/lib/crt1.o /usr/lib/crti.o /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/crtbegin.o -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1 -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/../../../../i686-pc-linux-gnu/lib -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/../../.. /tmp/ccd2RdDf.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1.1/crtend.o /usr/lib/crtn.o

./tc < tc.C > aus // does not finish
./tc 
hallo
^D^D^D^D^D^D^D //does not return to shell either!
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: