Hi,
after tracking down an issue [1] in dvisvgm [2] related to GCC 4.5.0, it
turned out that GCC 4.5.0 doesn't handle sub-classes defined and
instantiated in a template's method properly. At least on x86_64 Linux
systems, the code listed below leads to a segfault, while it works on
Windows/MinGW (x64). I built it with "g++ -g f1.cpp f2.cpp main.cpp".
valgrind backtrace:
==12833== Process terminating with default action of signal 11 (SIGSEGV)
==12833== Bad permissions for mapped region at address 0x0
==12833==at 0x0: ???
==12833==by 0x400C9B: C::doit() (c.h:22)
==12833==by 0x400B77: f2() (f2.cpp:6)
==12833==by 0x400D65: main (main.cpp:7)
Does anybody know if this is a known issue, or should I file a bug report?
Regards,
Martin
[1]
http://sourceforge.net/tracker/?func=detail&aid=3031498&group_id=145640&atid=762580
[2] http://dvisvgm.sourceforge.net
main.cpp
#include "f1.h"
#include "f2.h"
int main () {
f1();
f2();
}
f1.h
#ifndef F1_H
#define F1_H
void f1 ();
#endif
f1.cpp
#include "f1.h"
#include "c.h"
void f1 () {
C c;
c.doit();
}
f2.h
#ifndef F2_H
#define F2_H
void f2 ();
#endif
f2.cpp
#include "f2.h"
#include "c.h"
void f2 () {
C c;
c.doit();
}
c.h
#ifndef C_H
#define C_H
#include
template
class C
{
public:
struct Actions {
virtual ~Actions () {}
virtual void fail () {}
};
void doit () {
struct DoitActions : Actions {
void fail () {
std::cout << "hello\n";
}
} actions;
perform_actions(actions);
}
void perform_actions (Actions &actions) {
actions.fail();
}
};
#endif
