[Bug c++/21340] New: error in constructor lookup (can't find constructor with "const void**" argument)

[benoit at zeroc dot com]

Ice for C++ from ZeroC (http://www.zeroc.com, source code available) doesn't compile anymore with 
GCC 4.0.0 (I also tried with GCC from CVS and the result is the same). It compiled fine with GCC 3.4.2. 

I'm getting an error which looks like the following with 4.0.0:

Main.cpp: In constructor 'IteratorI::IteratorI()':
Main.cpp:31: error: no matching function for call to 'Iterator::Iterator(const void**)'
Main.cpp:6: note: candidates are: Iterator::Iterator()
Main.cpp:6: note:                 Iterator::Iterator(const Iterator&)

I don't understand why it's looking up this constructor, the code doesn't contain any reference to it. I'm 
also getting a segmentation fault of the compiler with similar code (see the code sample below). Here's 
a small test case demonstrating the problem(s):

-----
class Base
{
};

class Iterator : virtual public Base
{
};
bool operator==(const Iterator&, const Iterator&);

class IteratorI : public Iterator
{
};

class Obj
{
    bool operator==(const Obj&) const { return true; }
};

template <typename T>
bool dummy(const Obj& lhs, const Obj& rhs)
{
    const Obj* lhsKey = &lhs;
    const Obj* rhsKey = &rhs;
    return *lhsKey == *rhsKey;
}

int 
main(int argc, char** argv)
{
    // G++ segfault with the following line uncommented
    //Iterator* it1 = new Iterator();

    // error: no matching function for call to 'Iterator::Iterator(const void**)'
    IteratorI* it2 = new IteratorI(); 
}
-----

The output of 'g++ -v -save-temps Main.cpp':

-----
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --enable-threads --prefix=/opt/gcc-4.0.0
Thread model: posix
gcc version 4.0.0
 /opt/gcc-4.0.0/libexec/gcc/i686-pc-linux-gnu/4.0.0/cc1plus -E -quiet -v -D_GNU_SOURCE 
Main.cpp -mtune=pentiumpro -fpch-preprocess -o Main.ii
ignoring nonexistent directory "/opt/gcc-4.0.0/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../i686-pc-
linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/gcc-4.0.0/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0
 /opt/gcc-4.0.0/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/i686-pc-linux-gnu
 /opt/gcc-4.0.0/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/backward
 /usr/local/include
 /opt/gcc-4.0.0/include
 /opt/gcc-4.0.0/lib/gcc/i686-pc-linux-gnu/4.0.0/include
 /usr/include
End of search list.
 /opt/gcc-4.0.0/libexec/gcc/i686-pc-linux-gnu/4.0.0/cc1plus -fpreprocessed Main.ii -quiet 
-dumpbase Main.cpp -mtune=pentiumpro -auxbase Main -version -o Main.s
GNU C++ version 4.0.0 (i686-pc-linux-gnu)
        compiled by GNU C version 4.0.0.
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=64389
Main.cpp: In constructor 'IteratorI::IteratorI()':
Main.cpp:31: error: no matching function for call to 'Iterator::Iterator(const void**)'
-----

-- 
           Summary: error in constructor lookup (can't find constructor with
                    "const void**" argument)
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: benoit at zeroc dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21340