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* [Bug c++/38649]  New: [4.4 regression] Trouble with defaulted constructors
@ 2008-12-27 23:52 reichelt at gcc dot gnu dot org
  2008-12-27 23:53 ` [Bug c++/38649] " reichelt at gcc dot gnu dot org
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2008-12-27 23:52 UTC (permalink / raw)
  To: gcc-bugs

The following invalid code snippets are accepted on mainline:

========================
struct A
{
  A(...) = default;
};
========================

========================
struct A
{
  A(const A&, ...) = default;
};
========================

Apparently defaultable_fn_p in cp/class.c doesn't handle the ellipsis
correctly. This makes me wonder whether type_has_user_nondefault_constructor
which contains similar code has the same problem.


This bug can be exploited to trigger an ICE:

========================
struct A
{
  A(...) = default;
  A(const A&);
};

void foo()
{
  A a;
}
========================

bug.cc: In constructor 'A::A(...)':
bug.cc:3: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]

This makes the bug a regression as the second code snippet didn't crash
previous compilers.


-- 
           Summary: [4.4 regression] Trouble with defaulted constructors
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, accepts-invalid, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38649


^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2009-02-11  5:25 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-12-27 23:52 [Bug c++/38649] New: [4.4 regression] Trouble with defaulted constructors reichelt at gcc dot gnu dot org
2008-12-27 23:53 ` [Bug c++/38649] " reichelt at gcc dot gnu dot org
2008-12-27 23:59 ` pinskia at gcc dot gnu dot org
2008-12-29 16:20 ` paolo dot carlini at oracle dot com
2008-12-29 21:23 ` jason at gcc dot gnu dot org
2008-12-29 23:36 ` rguenth at gcc dot gnu dot org
2009-02-11  5:23 ` jason at gcc dot gnu dot org
2009-02-11  5:25 ` jason at gcc dot gnu dot org

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