c++/5922: 3.1 g++ expression reported as void

[tot@trema.com]

>Number:         5922
>Category:       c++
>Synopsis:       3.1 g++ expression reported as void
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 12 06:56:03 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     tot@trema.com
>Release:        3.1 20020311 (prerelease)
>Organization:
>Environment:
RedHat linux 6.2 on Intel
>Description:
C++ compiler on 3.1 prerelase 20020311 things that expression in
#define X(Y) ({ int y = (Y); y ? (y + 1) : 0; })
is void.  It works fine with plain gcc and in previous versions of g++.

>How-To-Repeat:
$ /usr/local/gcc3/bin/gcc -v t.cc
Reading specs from /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: ../gcc-3.1-branch/configure --host=i686-pc-linux-gnu --prefix=/usr/local/gcc3 --enable-version-specific-runtime-libs --enable-long-long --enable-threads
Thread model: posix
gcc version 3.1 20020311 (prerelease)
 /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -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__ t.cc -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase t.cc -version -o /tmp/cc7IVEE3.s
GNU CPP version 3.1 20020311 (prerelease) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20020311 (prerelease) (i686-pc-linux-gnu)
	compiled by GNU C version 3.1 20020311 (prerelease).
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/include/g++
 /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/include/g++/i686-pc-linux-gnu
 /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/include/g++/backward
 /usr/local/include
 /usr/local/gcc3/include
 /usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.1/include
 /usr/local/gcc3/i686-pc-linux-gnu/include
 /usr/include
End of search list.
t.cc: In function `int main()':
t.cc:14: void value not ignored as it ought to be
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Type: text/x-csrc; name="t.cc"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="t.cc"

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