[Bug c++/41863] New: [4.5 Regression] segfault with sizeof in template parameter

[Bug c++/41863] New: [4.5 Regression] segfault with sizeof in template parameter

[foom at fuhm dot net]

GCC 4.5 appears to fail when using sizeof(member-of-templated-type) inside a
template parameter.

I have tested the Debian gcc-snapshot 20090923-1 amd64 package, 20091010-1
i386, and Ubuntu gcc-snapshot 20091018-1 amd64. All exhibit the same behavior.
g++-4.4 works fine, however.

Changing to "sizeof(m_foo)" to "sizeof(T)" also fixes the problem.

File /tmp/test.cpp:
===CUT===
template<int X> struct Bar {
};

template<typename T>
class Foo {
    T m_foo;
    void crash() {
        Bar<sizeof(m_foo)> bar;
    }
};
===CUT===

$ g++ -c /tmp/test.cpp

/tmp/test.cpp: In member function 'void Foo<T>::crash()':
/tmp/test.cpp:8:26: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.


-- 
           Summary: [4.5 Regression] segfault with sizeof in template
                    parameter
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: foom at fuhm dot net
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-10-29 10:26 -------
Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2009-10-29 10:26:13
               date|                            |
   Target Milestone|---                         |4.5.0
            Version|unknown                     |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[dodji at gcc dot gnu dot org]

-- 

dodji at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |dodji at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-10-29 10:26:13         |2009-10-29 20:46:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[dodji at gcc dot gnu dot org]

------- Comment #2 from dodji at gcc dot gnu dot org  2009-10-29 22:56 -------
Patch sent to http://gcc.gnu.org/ml/gcc-patches/2009-10/msg01772.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[dodji at gcc dot gnu dot org]

------- Comment #4 from dodji at gcc dot gnu dot org  2009-10-30 07:09 -------
Fixed in 4.5.


-- 

dodji at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[dodji at gcc dot gnu dot org]

------- Comment #3 from dodji at gcc dot gnu dot org  2009-10-30 07:09 -------
Subject: Bug 41863

Author: dodji
Date: Fri Oct 30 07:08:36 2009
New Revision: 153735

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153735
Log:
Fix PR c++/41863

gcc/cp/ChangeLog:

        PR c++/41863
        * pt.c (iterative_hash_template_arg): articifial parms
        don't have DECL_PARM_INDEX set. Do not hash it.

gcc/testsuite/ChangeLog:

        PR c++/41863
        * g++.dg/template/sizeof12.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/template/sizeof12.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863

[Bug c++/41863] [4.5 Regression] segfault with sizeof in template parameter

[hjl at gcc dot gnu dot org]

------- Comment #5 from hjl at gcc dot gnu dot org  2009-10-30 16:05 -------
Subject: Bug 41863

Author: hjl
Date: Fri Oct 30 16:04:41 2009
New Revision: 153759

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153759
Log:
2009-10-30  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-10-30  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41863
        * g++.dg/template/sizeof12.C: New test.

        2009-10-29  Martin Jambor  <mjambor@suse.cz>

        PR tree-optimization/41775
        * g++.dg/torture/pr41775.C: New testcase.

        2009-10-28  Jakub Jelinek  <jakub@redhat.com>

        PR debug/41801
        * g++.dg/ext/sync-3.C: New test.

        2009-10-27  Jakub Jelinek  <jakub@redhat.com>

        PR c++/41020
        * g++.dg/lookup/extern-c-redecl5.C: Fix up regexp.

        2009-10-26  Jakub Jelinek  <jakub@redhat.com>

        PR bootstrap/41345
        * gcc.dg/pr41345.c: New test.

        2009-10-26  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41785
        * g++.dg/cpp0x/variadic96.C: New test.

        2009-10-26  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41020
        * g++.dg/lookup/extern-c-redecl2.C: New test.
        * g++.dg/lookup/extern-c-redecl3.C: Likewise.
        * g++.dg/lookup/extern-c-redecl4.C: Likewise.
        * g++.dg/lookup/extern-c-redecl5.C: Likewise.

        2009-10-23  Joseph Myers  <joseph@codesourcery.com>

        PR c/40033
        * gcc.dg/noncompile/pr40033-1.c: New test.

        2009-10-23  Joseph Myers  <joseph@codesourcery.com>

        PR c/41673
        * gcc.dg/Wstrict-aliasing-bogus-vla-1.c: New test.

        2009-10-21  Sebastian Pop  <sebastian.pop@amd.com>

        PR tree-optimization/41497
        * gcc.dg/tree-ssa/pr41497.c: New.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/variadic96.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/cpp0x/variadic96.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/ext/sync-3.C
      - copied unchanged from r153757, trunk/gcc/testsuite/g++.dg/ext/sync-3.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl2.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl2.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl3.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl3.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl4.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl4.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl5.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl5.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/template/sizeof12.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/template/sizeof12.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/torture/pr41775.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/torture/pr41775.C
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-vla-1.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-vla-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/noncompile/pr40033-1.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/noncompile/pr40033-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/pr41345.c
      - copied unchanged from r153757, trunk/gcc/testsuite/gcc.dg/pr41345.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/tree-ssa/pr41497.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr41497.c
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41863