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* [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp
@ 2004-02-17 11:16 thome at lix dot polytechnique dot fr
2004-02-17 16:08 ` [Bug libstdc++/14173] [3.4/3.5 Regression] " pinskia at gcc dot gnu dot org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: thome at lix dot polytechnique dot fr @ 2004-02-17 11:16 UTC (permalink / raw)
To: gcc-bugs
g++ -fpack-struct hello.cpp ices within libstdc++ when compiling:
#include <iostream>
int main()
{
std::cout << "Hello, world\n";
return 0;
}
localhost : ~ $ g++ -c -fpack-struct hello.cpp
In file included from
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/ios:49,
from
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/ostream:45,
from
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/iostream:45,
from hello.cpp:1:
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:
In member function `std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags)':
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:535:
error: cannot bind packed field
`((std::ios_base*)this)->std::ios_base::_M_flags' to `std::_Ios_Fmtflags&'
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:
In member function `std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags,
std::_Ios_Fmtflags)':
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:552:
error: cannot bind packed field
`((std::ios_base*)this)->std::ios_base::_M_flags' to `std::_Ios_Fmtflags&'
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:553:
error: cannot bind packed field
`((std::ios_base*)this)->std::ios_base::_M_flags' to `std::_Ios_Fmtflags&'
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:
In member function `void std::ios_base::unsetf(std::_Ios_Fmtflags)':
/localdisk/thome/Packages/gcc-3.4-20040211/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/bits/ios_base.h:564:
error: cannot bind packed field
`((std::ios_base*)this)->std::ios_base::_M_flags' to `std::_Ios_Fmtflags&'
g++: Internal error: Segmentation fault (program cc1plus)
Please submit a full bug report.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
--
Summary: cvs20040211: -fpack-struct crashes on hello_world.cpp
Product: gcc
Version: 3.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: thome at lix dot polytechnique dot fr
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/14173] [3.4/3.5 Regression] cvs20040211: -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
@ 2004-02-17 16:08 ` pinskia at gcc dot gnu dot org
2004-02-19 3:17 ` [Bug c++/14173] [3.4/3.5 Regression] " reichelt at gcc dot gnu dot org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-17 16:08 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-02-17 16:08 -------
Confirmed. The problem is that the seg fault is caused by a stack overflow due to infinite recursively.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |error-recovery, ice-on-
| |invalid-code
Known to fail| |3.4.0 3.5.0
Known to work| |3.3.1
Last reconfirmed|0000-00-00 00:00:00 |2004-02-17 16:08:25
date| |
Summary|cvs20040211: -fpack-struct |[3.4/3.5 Regression]
|crashes on hello_world.cpp |cvs20040211: -fpack-struct
| |crashes on hello_world.cpp
Target Milestone|--- |3.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
2004-02-17 16:08 ` [Bug libstdc++/14173] [3.4/3.5 Regression] " pinskia at gcc dot gnu dot org
@ 2004-02-19 3:17 ` reichelt at gcc dot gnu dot org
2004-02-20 2:41 ` giovannibajo at libero dot it
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2004-02-19 3:17 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From reichelt at gcc dot gnu dot org 2004-02-19 03:17 -------
Here's a redux for the ICE:
=============================================
struct A;
void foo(const A&);
struct A
{
A(const A&);
};
struct B
{
A a;
A bar() { return a; }
};
=============================================
If the ICE is fixed one should probably revisit the errors in libstdc++.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |reichelt at gcc dot gnu dot
| |org
Severity|minor |critical
Component|libstdc++ |c++
Keywords|error-recovery, ice-on- |ice-on-valid-code, monitored
|invalid-code |
Known to work|3.3.1 |3.3.3
Summary|[3.4/3.5 Regression] |[3.4/3.5 Regression] -fpack-
|cvs20040211: -fpack-struct |struct crashes on
|crashes on hello_world.cpp |hello_world.cpp
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
2004-02-17 16:08 ` [Bug libstdc++/14173] [3.4/3.5 Regression] " pinskia at gcc dot gnu dot org
2004-02-19 3:17 ` [Bug c++/14173] [3.4/3.5 Regression] " reichelt at gcc dot gnu dot org
@ 2004-02-20 2:41 ` giovannibajo at libero dot it
2004-02-20 7:10 ` mmitchel at gcc dot gnu dot org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: giovannibajo at libero dot it @ 2004-02-20 2:41 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-02-20 02:41 -------
The segfault looks like a memory corruption problem (or my GDB is nuts), so
I'll leave it to someone else.
-fpack-struct is not compatible with libstdc++-v3. For once, you should have
compiled the library itself with -fpack-struct, otherwise you are going to get
segfaults at runtime due to different object layout.
A good solution could be to make -fpack-struct affects only user-defined
structures. This could be a check for structs defined in system headers or in
namespace std (which is reserved anyway). I will submit a patch to change the
behaviour of -fpack-struct once the segfault is solved.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |giovannibajo at libero dot
| |it
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
` (2 preceding siblings ...)
2004-02-20 2:41 ` giovannibajo at libero dot it
@ 2004-02-20 7:10 ` mmitchel at gcc dot gnu dot org
2004-02-20 8:57 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-02-20 7:10 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-02-20 07:10 -------
IMO, the right fix for this PR is to remove -fpack-struct. It's an option
likely to burn almost all users due to the fact that the C/C++ standard
libraries are never going to be built in that mode on most systems.
Structure-packing should be done on a per-type basis.
On the other hand, there's an easy fix. I'll check that in when testing completes.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |mark at codesourcery dot com
|dot org |
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
` (3 preceding siblings ...)
2004-02-20 7:10 ` mmitchel at gcc dot gnu dot org
@ 2004-02-20 8:57 ` cvs-commit at gcc dot gnu dot org
2004-02-20 9:03 ` cvs-commit at gcc dot gnu dot org
2004-02-20 9:04 ` mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-02-20 8:57 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-02-20 08:57 -------
Subject: Bug 14173
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: mmitchel@gcc.gnu.org 2004-02-20 08:57:33
Modified files:
gcc/cp : ChangeLog decl.c name-lookup.c pt.c semantics.c
gcc/testsuite : ChangeLog
gcc/testsuite/g++.dg/other: error8.C
Added files:
gcc/testsuite/g++.dg/ext: packed5.C
gcc/testsuite/g++.dg/warn: Wunused-5.C
Log message:
PR c++/14199
* pt.c (tsubst_copy): Call mark_used for a PARM_DECL.
PR c++/14173
* semantics.c (begin_class_definition): Set TYPE_PACKED correctly
for all type variants.
PR c++/14173
* g++.dg/ext/packed5.C: New test.
PR c++/14199
* g++.dg/warn/Wunused-5.C: New test.
PR c++/13927
* decl.c (duplicate_decls): Return error_mark_node for invalid
redeclarations.
* name-lookup.c (push_namespace): Ignore the return value from
pushdecl.
* pt.c (push_template_decl_real): Robustify.
PR c++/13927
* g++.dg/other/error8.C: Remove XFAIL markers.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3962&r2=1.3963
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&r1=1.1187&r2=1.1188
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/name-lookup.c.diff?cvsroot=gcc&r1=1.39&r2=1.40
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.830&r2=1.831
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&r1=1.388&r2=1.389
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3523&r2=1.3524
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/packed5.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/other/error8.C.diff?cvsroot=gcc&r1=1.1&r2=1.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/warn/Wunused-5.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
` (4 preceding siblings ...)
2004-02-20 8:57 ` cvs-commit at gcc dot gnu dot org
@ 2004-02-20 9:03 ` cvs-commit at gcc dot gnu dot org
2004-02-20 9:04 ` mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-02-20 9:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-02-20 09:03 -------
Subject: Bug 14173
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_4-branch
Changes by: mmitchel@gcc.gnu.org 2004-02-20 09:03:34
Modified files:
gcc/cp : ChangeLog pt.c semantics.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/ext: packed5.C
gcc/testsuite/g++.dg/warn: Wunused-5.C
Log message:
PR c++/14199
* pt.c (tsubst_copy): Call mark_used for a PARM_DECL.
PR c++/14173
* semantics.c (begin_class_definition): Set TYPE_PACKED correctly
for all type variants.
PR c++/14173
* g++.dg/ext/packed5.C: New test.
PR c++/14199
* g++.dg/warn/Wunused-5.C: New test.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3892.2.57&r2=1.3892.2.58
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.816.2.11&r2=1.816.2.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.381.4.7&r2=1.381.4.8
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.95&r2=1.3389.2.96
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/packed5.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/warn/Wunused-5.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/14173] [3.4/3.5 Regression] -fpack-struct crashes on hello_world.cpp
2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
` (5 preceding siblings ...)
2004-02-20 9:03 ` cvs-commit at gcc dot gnu dot org
@ 2004-02-20 9:04 ` mmitchel at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-02-20 9:04 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-02-20 09:04 -------
Fixed in GCC 3.4.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14173
^ permalink raw reply [flat|nested] 8+ messages in thread
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2004-02-17 11:16 [Bug libstdc++/14173] New: cvs20040211: -fpack-struct crashes on hello_world.cpp thome at lix dot polytechnique dot fr
2004-02-17 16:08 ` [Bug libstdc++/14173] [3.4/3.5 Regression] " pinskia at gcc dot gnu dot org
2004-02-19 3:17 ` [Bug c++/14173] [3.4/3.5 Regression] " reichelt at gcc dot gnu dot org
2004-02-20 2:41 ` giovannibajo at libero dot it
2004-02-20 7:10 ` mmitchel at gcc dot gnu dot org
2004-02-20 8:57 ` cvs-commit at gcc dot gnu dot org
2004-02-20 9:03 ` cvs-commit at gcc dot gnu dot org
2004-02-20 9:04 ` mmitchel at gcc dot gnu dot org
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