| Summary: | [3.2/3.3/3.4 regression] virtual inheritance segfault | ||
|---|---|---|---|
| Product: | gcc | Reporter: | stefan |
| Component: | c++ | Assignee: | Nathan Sidwell <nathan> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | gcc-bugs |
| Priority: | P3 | Keywords: | ice-on-valid-code |
| Version: | 3.2.2 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | ||
| Attachments: | gcc-3.2.2-virtual-inheritance-test.cc | ||
State-Changed-From-To: open->analyzed
State-Changed-Why: Confirmed. Here's a very slightly reduced testcase:
--------------------------
struct A { };
struct B {
B(A *) {}
};
struct C : virtual public A, public B {
C() : B(this) {}
};
struct D : virtual public C {};
main() {
new D();
}
------------------------
Executing this program segfaults with 3.2.2, 3.3, and 3.4.
So it is a regression, assuming the code is legal.
The problem is in casting this to A* in the constructor
C::C. It's trying to cast to a virtual base, and it seems
to me that this information is not available at the time
we get to C::C, which then causes the segfault. But that's
just a wild guess.
W.
Responsible-Changed-From-To: unassigned->nathan Responsible-Changed-Why: fixing From: nathan@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/9629 Date: 16 Mar 2003 14:36:43 -0000 CVSROOT: /cvs/gcc Module name: gcc Changes by: nathan@gcc.gnu.org 2003-03-16 14:36:43 Modified files: gcc/cp : ChangeLog cp-tree.h init.c class.c parser.c pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/init: ctor2.C Log message: cp: PR c++/9629 * cp-tree.h (struct language_function): Add in_base_initializer. (in_base_initializer): define it. (expand_member_init): Remove INIT param. * init.c (expand_member_init): Remove INIT param, return the member. (emit_mem_initializers): Set in_base_initializer. * class.c (build_base_path): Check in_base_initializer. * parser.c (cp_parser_mem_initializer): Set in_base_initializer. * pt.c (tsubst_initializer_list): Likewise. testsuite: PR c++/9629 * g++.dg/init/ctor2.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3278&r2=1.3279 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&r1=1.825&r2=1.826 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/init.c.diff?cvsroot=gcc&r1=1.314&r2=1.315 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/class.c.diff?cvsroot=gcc&r1=1.526&r2=1.527 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.51&r2=1.52 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.670&r2=1.671 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.2511&r2=1.2512 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ctor2.C.diff?cvsroot=gcc&r1=NONE&r2=1.1 From: nathan@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/9629 Date: 16 Mar 2003 14:36:43 -0000 CVSROOT: /cvs/gcc Module name: gcc Changes by: nathan@gcc.gnu.org 2003-03-16 14:36:43 Modified files: gcc/cp : ChangeLog cp-tree.h init.c class.c parser.c pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/init: ctor2.C Log message: cp: PR c++/9629 * cp-tree.h (struct language_function): Add in_base_initializer. (in_base_initializer): define it. (expand_member_init): Remove INIT param. * init.c (expand_member_init): Remove INIT param, return the member. (emit_mem_initializers): Set in_base_initializer. * class.c (build_base_path): Check in_base_initializer. * parser.c (cp_parser_mem_initializer): Set in_base_initializer. * pt.c (tsubst_initializer_list): Likewise. testsuite: PR c++/9629 * g++.dg/init/ctor2.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3278&r2=1.3279 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&r1=1.825&r2=1.826 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/init.c.diff?cvsroot=gcc&r1=1.314&r2=1.315 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/class.c.diff?cvsroot=gcc&r1=1.526&r2=1.527 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.51&r2=1.52 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.670&r2=1.671 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.2511&r2=1.2512 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ctor2.C.diff?cvsroot=gcc&r1=NONE&r2=1.1 State-Changed-From-To: analyzed->closed
State-Changed-Why: fixed on HEAD and 3.3
2003-03-16 Nathan Sidwell <nathan@codesourcery.com>
PR c++/9629
* cp-tree.h (struct language_function): Add in_base_initializer.
(in_base_initializer): define it.
(expand_member_init): Remove INIT param.
* init.c (expand_member_init): Remove INIT param, return the member.
(emit_mem_initializers): Set in_base_initializer.
* class.c (build_base_path): Check in_base_initializer.
* parser.c (cp_parser_mem_initializer): Set in_base_initializer.
* pt.c (tsubst_initializer_list): Likewise.
From: nathan@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/9629 Date: 17 Mar 2003 12:00:32 -0000 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_3-branch Changes by: nathan@gcc.gnu.org 2003-03-17 12:00:31 Modified files: gcc/cp : ChangeLog cp-tree.h init.c class.c parse.y pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/init: ctor2.C Log message: cp: PR c++/9629 * cp-tree.h (struct language_function): Add in_base_initializer. (in_base_initializer): define it. (expand_member_init): Remove INIT param. * init.c (expand_member_init): Remove INIT param, return the member. (emit_mem_initializers): Set in_base_initializer. * class.c (build_base_path): Check in_base_initializer. * parse.y (begin_member_init): New reduction. (member_init): Use it. * pt.c (tsubst_initializer_list): Set in_base_initializer. testsuite: PR c++/9629 * g++.dg/init/ctor2.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.85&r2=1.3076.2.86 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.776.2.12&r2=1.776.2.13 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/init.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.299.2.3&r2=1.299.2.4 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/class.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.499.2.9&r2=1.499.2.10 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parse.y.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.284.2.4&r2=1.284.2.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.635.2.14&r2=1.635.2.15 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.2261.2.103&r2=1.2261.2.104 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ctor2.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=NONE&r2=1.1.2.1 From: nathan@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/9629 Date: 17 Mar 2003 12:00:32 -0000 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_3-branch Changes by: nathan@gcc.gnu.org 2003-03-17 12:00:31 Modified files: gcc/cp : ChangeLog cp-tree.h init.c class.c parse.y pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/init: ctor2.C Log message: cp: PR c++/9629 * cp-tree.h (struct language_function): Add in_base_initializer. (in_base_initializer): define it. (expand_member_init): Remove INIT param. * init.c (expand_member_init): Remove INIT param, return the member. (emit_mem_initializers): Set in_base_initializer. * class.c (build_base_path): Check in_base_initializer. * parse.y (begin_member_init): New reduction. (member_init): Use it. * pt.c (tsubst_initializer_list): Set in_base_initializer. testsuite: PR c++/9629 * g++.dg/init/ctor2.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.85&r2=1.3076.2.86 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.776.2.12&r2=1.776.2.13 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/init.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.299.2.3&r2=1.299.2.4 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/class.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.499.2.9&r2=1.499.2.10 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parse.y.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.284.2.4&r2=1.284.2.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.635.2.14&r2=1.635.2.15 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.2261.2.103&r2=1.2261.2.104 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ctor2.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=NONE&r2=1.1.2.1 |
Hi! The following minimal testcase compiles and runs with gcc-2.95 and compiles and crashes with gcc-3.2.2. I am not sure whether it is a bug in the testcase or a bug in the compiler, but in any case I would appreciate hearing whats the problem with the testcase. Thanks. Cu... Stefan Release: gcc-3.2.2 Environment: Debian unstable on i386