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[Bug c++/43036] [4.3/4.4/4.5 Regresion] c++ compilation hang



------- Comment #9 from rguenth at gcc dot gnu dot org  2010-02-13 10:45 -------
Confirmed.

We loop in

0x0823fa53 in cp_build_qualified_type_real (type=0xb39cbf70, type_quals=1, 
    complain=7) at /home/richard/src/gcc-4_4-branch/gcc/cp/tree.c:781
781           for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
(gdb) finish
Run till exit from #0  0x0823fa53 in cp_build_qualified_type_real (
    type=0xb39cbf70, type_quals=1, complain=7)
    at /home/richard/src/gcc-4_4-branch/gcc/cp/tree.c:781

for

(gdb) call debug_tree (type)
 <array_type 0xb39cbf70 IF12_IF12_string_7_2
    type <array_type 0xb39c6c30 IF12_string_7
        type <integer_type 0xb77651a0 char public string-flag type_6 QI
            size <integer_cst 0xb77546ac constant 8>

(gdb) p type
$3 = (tree) 0xb39cbf70
(gdb) p type->type.next_variant 
$4 = (union tree_node *) 0xb39d0888
(gdb) p
type->type.main_variant->type.next_variant->type.next_variant->type.next_variant->type.next_variant->type.next_variant->type.next_variant 
$9 = (union tree_node *) 0xb39d0888

so we have a cyclic type variant list.  Obviously not a too bright idea.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
      Known to fail|                            |4.3.4 4.4.3 4.5.0
      Known to work|                            |4.2.4
   Last reconfirmed|0000-00-00 00:00:00         |2010-02-13 10:45:17
               date|                            |
            Summary|c++ compilation hang        |[4.3/4.4/4.5 Regresion] c++
                   |                            |compilation hang
   Target Milestone|---                         |4.3.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43036


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