If you declare a static data member twice, gcc will hang while compiling. Looks like stuck in a loop to me - top shows gcc sucking 99.9% of cpu. aaa.h ---------- template <class R, class I> class Aaa { public: // methods Aaa() {} virtual ~Aaa() {} static int _test; static int _test; }; template < class R, class I > int Aaa<R,I>::_test; ----------- aab.h ----------- #include "aaa.h" class Aab : public Aaa< int, float > { public: // methods Aab(); virtual ~Aab(); }; ------------ aab.cpp ------------ #include "aab.h" Aab::Aab(){} Aab::~Aab(){} Release: 3.2, 3.3, 3.4 (originally reported for 2.96) Environment: Red Hat Linux 7.3 2.96-110 How-To-Repeat: Compile the code included in the description: gcc aab.cpp
Fix: Unknown
State-Changed-From-To: open->analyzed State-Changed-Why: Confrimed. All supported versions fail to compile this, 3.2.2 gives an endless loop, 3.3 and 3.4 give an ICE at the same place. Here's a minimal legal example, it is possible to remove the out of class definition of the static member without the ICE going away. ---------------- cut ----------------- template <class R> struct A { static int _test; static int _test; }; template <class R> int A<R>::_test = 0; struct B : public A <int> { }; ---------------- cut ----------------- 9649.cc: In instantiation of `A<int>': 9649.cc:7: instantiated from here 9649.cc:4: internal compiler error: in finish_member_declaration, at cp/semantics.c:1868 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
From: "Giovanni Bajo" <giovannibajo@libero.it> To: <gcc-gnats@gcc.gnu.org>, <gcc-bugs@gcc.gnu.org>, <gendzwil@sedsystems.ca>, <nobody@gcc.gnu.org>, <gcc-prs@gcc.gnu.org> Cc: Subject: Re: c++/9649: [3.3/3.4 regression] ICE in finish_member_declaration at cp/semantics.c:1850 when redeclaring a static member variable Date: Mon, 5 May 2003 12:09:40 +0200 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9649 Actually, the code is ill-formed. §9.2p1 states "A member shall not be declared twice in the member-specification, except that a nested class or member class template can be declared and then later defined". So, this is a 3.3/3.4 regression because 2.95 correctly rejected the code with an error message. Giovanni Bajo
Subject: Bug 9649 CVSROOT: /cvs/gcc Module name: gcc Changes by: mmitchel@gcc.gnu.org 2003-06-20 02:40:37 Modified files: gcc/cp : ChangeLog cp-tree.h decl.c semantics.c gcc/testsuite : ChangeLog gcc/testsuite/g++.old-deja/g++.other: anon7.C Added files: gcc/testsuite/g++.dg/template: static4.C Log message: PR c++/9649 * cp-tree.h (pushdecl_class_level): Change prototype. (push_class_level_binding): Likewise. * decl.c (add_binding): Reject duplicate static data members. (pushdecl_class_level): Return a value indicating whether or not the binding was valid. (push_class_level_binding): Likewise. * semantics.c (finish_member_declaration): Don't keep invalid declarations. PR c++/9649 * g++.dg/template/static4.C: New test. * g++.old-deja/g++.other/anon7.C: Remove spurious error messages. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3440&r2=1.3441 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&r1=1.857&r2=1.858 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&r1=1.1068&r2=1.1069 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&r1=1.311&r2=1.312 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.2782&r2=1.2783 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/static4.C.diff?cvsroot=gcc&r1=NONE&r2=1.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.other/anon7.C.diff?cvsroot=gcc&r1=1.2&r2=1.3
Subject: Bug 9649 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_3-branch Changes by: mmitchel@gcc.gnu.org 2003-06-20 03:06:32 Modified files: gcc/cp : ChangeLog cp-tree.h decl.c semantics.c gcc/testsuite : ChangeLog gcc/testsuite/g++.old-deja/g++.other: anon7.C Log message: PR c++/9649 * cp-tree.h (pushdecl_class_level): Change prototype. (push_class_level_binding): Likewise. * decl.c (add_binding): Reject duplicate static data members. (pushdecl_class_level): Return a value indicating whether or not the binding was valid. (push_class_level_binding): Likewise. * semantics.c (finish_member_declaration): Don't keep invalid declarations. PR c++/9649 * g++.dg/template/static4.C: New test. * g++.old-deja/g++.other/anon7.C: Remove spurious error messages. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.154&r2=1.3076.2.155 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=1.776.2.22&r2=1.776.2.23 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.965.2.49&r2=1.965.2.50 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.282.4.4&r2=1.282.4.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.2261.2.192&r2=1.2261.2.193 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.other/anon7.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.1&r2=1.1.54.1
Fixed in GCC 3.3.1, GCC 3.4.