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c++/6453: g++ regression in 3.1
- From: green at redhat dot com
- To: gcc-gnats at gcc dot gnu dot org
- Date: Thu, 25 Apr 2002 08:08:35 -0700
- Subject: c++/6453: g++ regression in 3.1
>Number: 6453
>Category: c++
>Synopsis: g++ regression in 3.1
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: ice-on-illegal-code
>Submitter-Id: net
>Arrival-Date: Thu Apr 25 08:16:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Anthony Green
>Release: 3.1 20020424 (prerelease)
>Organization:
>Environment:
System: Linux louie 2.4.7-10smp #1 SMP Thu Sep 6 17:09:31 EDT 2001 i686 unknown
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: /louie/green/3.1/gcc/configure --prefix=/louie/green/3.1/i --enable-threads --enable-languages=c,c++,java : (reconfigured) : (reconfigured)
>Description:
Given the following nonsense code...
void *foo()
{
char x[100];
x++;
return (void *) x;
}
Red Hat's g++ 2.96 reports:
$ g++ -c c.cc
c.cc: In function `void *foo ()':
c.cc:4: non-lvalue in increment
c.cc:3: warning: address of local variable `x' returned
Unfortunately I don't have an older FSF release handy to test on (like
2.95, or 3.0), so I don't know what they do. However, the current 3.1
branch says:
$ g++ -c c.cc
non-lvalue
in
increment
address
of
local
variable
`
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
>How-To-Repeat:
Compile the following with g++:
void *foo()
{
char x[100];
x++;
return (void *) x;
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: