[MySQL-plusplus] Segmention fault with several connections

On 6/2/06, Tomas Fischer wrote:

Hi,

isn't it possible to create several
mysqlpp::Connections? Both of them use same db, host,
user. Code below doesn't work.

class A {
A() {
mysqlpp::Connection con;
con= mysqlpp::Connection::Connection(...);
}
};

class B {
B() {
mysqlpp::Connection con;
con= mysqlpp::Connection::Connection(...);
}
};

int main() {
A a;
B b;
return 0;
}

Using g++ 4.0.4
mysql++: Version: 2.0.7-2+b1 (Debian).

It doesn't matter if con are objects or pointers.

Best regards,
Tomas.


gdb trace-back:
#0 0x080498e9 in
mysqlpp::Connection::OptionInfo::operator= ()
#1 0x08049974 in std::__copy<false,

std::random_access_iterator_tag>::copy<std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo const&,
mysqlpp::Connection::OptionInfo const*>,
std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo&,
mysqlpp::Connection::OptionInfo*> >
()
#2 0x08049a4c in
std::__copy_aux<std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo const&,
mysqlpp::Connection::OptionInfo const*>,
std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo&,
mysqlpp::Connection::OptionInfo*> > ()
#3 0x08049af0 in std::__copy_normal<false,
false>::copy_n<std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo const&,
mysqlpp::Connection::OptionInfo const*>,
std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo&,
mysqlpp::Connection::OptionInfo*> > ()
#4 0x08049b9c in
std::copy<std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo const&,
mysqlpp::Connection::OptionInfo const*>,
std::_Deque_iterator<mysqlpp::Connection::OptionInfo,
mysqlpp::Connection::OptionInfo&,
mysqlpp::Connection::OptionInfo*> > ()
#5 0x0804c8ed in
std::deque<mysqlpp::Connection::OptionInfo,
std::allocator<mysqlpp::Connection::OptionInfo>
#6 0x0804ca5f in mysqlpp::Connection::operator= ()
#7 0x0804caf2 in A::A ()
#8 0x08048afb in main ()


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Drew M. wrote:
It would appear that the issue isn't so much multiple mysqlpp::Connections
coexisting, but an issue with the assignment operator.