>Submitter-Id: net
>Originator: Marko Makela
>Organization: Helsinki University of Technology
>Confidential: no
>Synopsis: initializing a struct having a class component fails
>Severity: serious
>Priority: medium
>Category: c++
>Class: ice-on-legal-code
>Release: 3.2.1 20020830 (Debian prerelease) (Debian testing/unstable)
>Environment:
System: Linux siphon 2.4.3 #4 Mon Apr 9 12:53:30 EEST 2001 i686 unknown unknown
GNU/Linux
Architecture: i686
host: i386-pc-linux-gnu
build: i386-pc-linux-gnu
target: i386-pc-linux-gnu
configured with: /mnt/data/gcc-3.1/gcc-3.2-3.2.1ds0/src/configure -v
--enable-languages=c,c++,java,f77,proto,objc,ada --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.2 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-java-gc=boehm --enable-objc-gc i386-linux
>Description:
If a struct has a class-valued component, initializing an instance
of the struct by using a brace-delimited initialization expression
triggers an ICE in cp_expr_size, at cp/cp-lang.c:130. It seems that
there must be an explicit declaration of both a copy constructor and
an assignment operator for the class in order for the bug to occur.
>How-To-Repeat:
The following code is a reduced test case that fails on this version
of the compiler. It seems to work in g++ (GCC) 3.2.1 20020905
(prerelease) on SunOS 5.8, so you may want to ignore this report.
class C
{
public:
C ();
C (const class C& old);
class C& operator= (const class C& old);
};
struct s
{
class C c;
};
void
f (void)
{
class C c;
struct s s = { c };
}
>Fix: Declare the struct with a pointer or a reference instead, or
do not declare a copy constructor or operator=() for the class.
