[Bug c++/34753] New: [4.3 regression] ICE with invalid template parameter in variadic template

[Bug c++/34753] New: [4.3 regression] ICE with invalid template parameter in variadic template

[reichelt at gcc dot gnu dot org]

The following invalid code snippet triggers an ICE on mainline:

================================================================
template<typename... T> struct A
{
  template<T> struct B {};
};

A<int>::B<0> b;
================================================================

bug.cc:3: error: parameter packs not expanded with `...':
bug.cc:3: note:         'T'
bug.cc: In instantiation of 'A<int>':
bug.cc:6:   instantiated from here
bug.cc:3: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]

The ICE appeared between 2007-11-30 and 2007-12-11.


-- 
           Summary: [4.3 regression] ICE with invalid template parameter in
                    variadic template
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, 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=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[reichelt at gcc dot gnu dot org]

-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[reichelt at gcc dot gnu dot org]

------- Comment #1 from reichelt at gcc dot gnu dot org  2008-01-12 18:23 -------
Here's a similar testcase with a function instead of a nested class
that also segfaults:

================================================================
template<typename... T> struct A
{
  template<T> A();
};

A<int> a;
================================================================


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2008-01-12 19:43 -------
Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Priority|P3                          |P4
   Last reconfirmed|0000-00-00 00:00:00         |2008-01-12 19:43:54
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[dgregor at gcc dot gnu dot org]

-- 

dgregor at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |dgregor at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-01-12 19:43:54         |2008-01-15 16:36:35
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[dgregor at gcc dot gnu dot org]

------- Comment #3 from dgregor at gcc dot gnu dot org  2008-01-29 14:01 -------
Subject: Bug 34753

Author: dgregor
Date: Tue Jan 29 13:59:59 2008
New Revision: 131938

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131938
Log:
2008-01-29  Douglas Gregor  <doug.gregor@gmail.com>

        PR c++/34055
        PR c++/34103
        PR c++/34219
        PR c++/34606
        PR c++/34753
        PR c++/34754
        PR c++/34755
        PR c++/34919
        PR c++/34961
        * c-pretty-print.c (pp_c_type_qualifier_list): Don't try to print
        qualifiers for an ERROR_MARK_NODE or a NULL_TREE.


2008-01-29  Douglas Gregor  <doug.gregor@gmail.com>

        PR c++/34055
        PR c++/34103
        PR c++/34219
        PR c++/34606
        PR c++/34753
        PR c++/34754
        PR c++/34755
        PR c++/34919
        PR c++/34961
        * typeck.c (check_return_expr): Tweak call to
        check_for_bare_parameter_packs.
        * class.c (add_method): Be careful with error_mark_nodes.
        * cp-tree.h (check_for_bare_parameter_packs): Remove "*" from
        signature.
        * pt.c (struct find_parameter_pack_data): Remove
        SET_PACKS_TO_ERROR.
        (find_parameter_packs_r): Don't use SET_PACKS_TO_ERROR.
        (uses_parameter_packs): Don't set SET_PACKS_TO_ERROR.
        (make_pack_expansion): Ditto.
        (check_for_bare_parameter_packs): Parameter is now a tree, not a
        tree*.
        (process_template_parm): Tweak call to
        check_for_bare_parameter_packs.  
        (push_template_decl_real): Tweak calls to
        check_for_bare_parameter_packs. If bare parameter packs are found
        in the list of exceptions, clear out that list after giving an
        error.
        * semantics.c (finish_cond): Tweak call to
        check_for_bare_parameter_packs.
        (finish_expr_stmt): Ditto.
        (finish_for_expr): Ditto.
        (finish_switch_cond): Ditto.
        (finish_mem_initializers): Ditto.
        (finish_member_declaration): Ditto.
        (finish_static_assert): Check for bare parameter packs in the
        condition.
        * decl2.c (cplus_decl_attributes): Check for bare parameter packs in
the
        attributes of a declaration.
        * parser.c (cp_parser_using_declaration): Tweak call to
        check_for_bare_parameter_packs.
        (cp_parser_base_clause): Ditto.


2008-01-29  Douglas Gregor  <doug.gregor@gmail.com>

        PR c++/34055
        PR c++/34103
        PR c++/34219
        PR c++/34606
        PR c++/34753
        PR c++/34754
        PR c++/34755
        PR c++/34919
        PR c++/34961
        * g++.dg/cpp0x/vt-34219-2.C: New.
        * g++.dg/cpp0x/pr32126.C: Tweak expected error messages.
        * g++.dg/cpp0x/vt-34961.C: New.
        * g++.dg/cpp0x/vt-34055.C: Tweak error messages; add new test
        cases from the re-opened PR.
        * g++.dg/cpp0x/vt-34753.C: New.
        * g++.dg/cpp0x/vt-34919.C: New.
        * g++.dg/cpp0x/vt-34754.C: New.
        * g++.dg/cpp0x/vt-34606.C: New.
        * g++.dg/cpp0x/vt-34219.C: New.
        * g++.dg/cpp0x/pr32125.C: Tweak expected error messages.
        * g++.dg/cpp0x/vt-34755.C: New.
        * g++.dg/cpp0x/pr31438.C: Ditto.
        * g++.dg/cpp0x/variadic81.C: Ditto.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34219-2.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34219.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34606.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34753.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34754.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34755.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34919.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34961.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-pretty-print.c
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/class.c
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/decl2.c
    trunk/gcc/cp/parser.c
    trunk/gcc/cp/pt.c
    trunk/gcc/cp/semantics.c
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/pr31438.C
    trunk/gcc/testsuite/g++.dg/cpp0x/pr32125.C
    trunk/gcc/testsuite/g++.dg/cpp0x/pr32126.C
    trunk/gcc/testsuite/g++.dg/cpp0x/variadic81.C
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-34055.C


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753

[Bug c++/34753] [4.3 regression] ICE with invalid template parameter in variadic template

[dgregor at gcc dot gnu dot org]

------- Comment #4 from dgregor at gcc dot gnu dot org  2008-01-29 14:25 -------
Fixed on mainline


-- 

dgregor at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34753