[Bug c++/46304] New: g++ crashes with ICE in bitmap_first_set_bit, at bitmap.c:770

[apataki at apataki dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46304

           Summary: g++ crashes with ICE in bitmap_first_set_bit, at
                    bitmap.c:770
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: apat...@apataki.net


g++ 4.5.1 crashes with an internal compiler error on the following C++ code
(trimmed down from a larger codebase - in this shortened state it is clearly
not expected to work/do anything useful):


#include <complex.h>


template<class T>
class ClassA
{
    complex double *data;

public:
    void setSize()
    {
    data[0] = 1.0 + 2.0i;
    }
};


template<class TCoeff, class TRHS>
class ClassB
{
    ClassA<TCoeff> a1;
    ClassA<TRHS> a2;

public:
    void setSize()
    {
    a1.setSize();
    a2.setSize();
    }
};


class ClassC
{
    ClassB<double, complex double> d;
    virtual void init();
};

void ClassC::init()
{
    d.setSize();
}



$ g++ -c z8.cc
z8.cc: In member function ‘void ClassA<T>::setSize() [with T = __complex__
double]’:
z8.cc:41:1: internal compiler error: in bitmap_first_set_bit, at bitmap.c:770
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccL3ZMfZ.out file, please attach this to
your bugreport.


$ g++ -v
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.5.1/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada,lto --enable-plugin
--enable-java-awt=gtk --disable-dssi
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) 

This is on a Fedora 14 x86-64 system.