The following invalid code snippet causes an ICE on the 4.0 branch and
mainline:
==================
struct A
{
struct B {};
};
struct A::B {};
==================
The error message is:
bug.cc:6: error: redefinition of 'struct A::B'
bug.cc:3: error: previous definition of 'struct A::B'
bug.cc:6: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in cp_parser_class_specifier, at cp/parser.c:12407
Please submit a full bug report, [etc.]
(Btw, this is the same problem as g++.dg/parse/error16.C.
Why the testsuite doesn't trigger is discussed in
http://gcc.gnu.org/ml/gcc/2005-02/msg00953.html)
The regression was probably caused by Mark's patch for PR c++/20152:
2005-02-22 Mark Mitchell <[EMAIL PROTECTED]>
PR c++/20152
* parser.c (cp_parser_class_head): Check for redefintions here.
* semantics.c (begin_class_definition): Not here.
A patch will follow soon.
--
Summary: [4.0/4.1 regression] ICE on duplicate class definition
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, monitored
Severity: normal
Priority: P2
Component: c++
AssignedTo: reichelt at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20499
