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Re: c++/10481: [3.3?/3.4 regression] Invalid use of non-static data member causes ICE.
- From: bangerth at dealii dot org
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, mmitchel at gcc dot gnu dot org, nobody at gcc dot gnu dot org, redi at gcc dot gnu dot org
- Date: 24 Apr 2003 13:57:41 -0000
- Subject: Re: c++/10481: [3.3?/3.4 regression] Invalid use of non-static data member causes ICE.
- Reply-to: bangerth at dealii dot org, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, mmitchel at gcc dot gnu dot org, nobody at gcc dot gnu dot org, redi at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Old Synopsis: Invalid use of non-static data member causes ICE.
New Synopsis: [3.3?/3.4 regression] Invalid use of non-static data member causes ICE.
Responsible-Changed-From-To: unassigned->mmitchel
Responsible-Changed-By: bangerth
Responsible-Changed-When: Thu Apr 24 13:57:41 2003
Responsible-Changed-Why:
I think you worked in this area recently when you fixed this
type `A' is not a base type for type `B'
problem.
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Thu Apr 24 13:57:41 2003
State-Changed-Why:
Confirmed.
------------------
struct A {
char a;
};
struct B {
void f() {
A::a;
}
};
---------------------
g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
x.cc: In member function `void B::f()':
x.cc:7: internal compiler error: Segmentation fault
I can't presently tell whether 3.3 ICEs, since my version
is a couple of days old. I really should update...
The error happens here:
(gdb) bt
#0 finish_non_static_data_member (decl=0x401a0654,
qualifying_scope=0x401a03cc) at ../../gcc-3.4-CVS/gcc/cp/semantics.c:1219
#1 0x080fa827 in cp_parser_postfix_expression (parser=0x401a2f40,
address_p=false) at ../../gcc-3.4-CVS/gcc/cp/parser.c:3824
#2 0x080fb050 in cp_parser_unary_expression (parser=0x401a2f40,
address_p=false) at ../../gcc-3.4-CVS/gcc/cp/parser.c:4499
#3 0x080fb9fc in cp_parser_pm_expression (parser=0x401a2f40)
at ../../gcc-3.4-CVS/gcc/cp/parser.c:4952
#4 0x08104c82 in cp_parser_binary_expression (parser=0x401a2f40,
token_tree_map=0x8474fc0, fn=0x80fb9e0 <cp_parser_pm_expression>)
at ../../gcc-3.4-CVS/gcc/cp/parser.c:13571
which is the inner while loop here:
while (!DERIVED_FROM_P (context_for_name_lookup (decl), access_type))
{
access_type = TYPE_CONTEXT (access_type);
while (DECL_P (access_type))
access_type = DECL_CONTEXT (access_type);
}
It ICEs since access_type==0. This code hasn't been
changed recently, just as the one one frame higher, so
I can't pinpoint a certain patch.
W.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10481