[Bug g++ 3.4.4 ?] g++, -O2, static member data in line functions

[Brad Bell]

        http://www.cygwin.com/ml/cygwin/2007-10/msg00507.html

        http://www.cygwin.com/ml/cygwin/2007-10/msg00511.html






I am attaching the information for the bug report to this message:

I sent a bug report to [EMAIL PROTECTED] becasue I thought it was related to cygwin, instead of g++, see The people at cygwin seem to have bassed the buck onto the gcc community; see Here is my question: Is it true that there was a bug in g++ 3.4.4 related to using static data in line functions ? This is very important because template classes often have static member data access functions that return data connected to each instance of a template class. These accessor fucntions are often short and get inlined when -O2 is used.

bug.sh
Description: bash shell script for running the bug test

# include <string>
class Element {
public:
	std::string   file;

	static Element *root(void)
	{	static Element r;
		return &r;
	}

}; 

# include "bug0.hpp"
extern void bug2(void);
int main(void)
{	std::string str("A");
	char c = str[0];

	Element *r = Element::root();
	bug2();

	return 0;
}

# include <cassert>
# include "bug0.hpp"
void bug2(void)
{
	Element *r = Element::root();
	Element *s = Element::root();

	assert( r != 0 );
}

BUG REPORT:   Cygwin, g++, -O2, static member function, std::string
RUN COMMAND:  ./bug.sh
RESULT:       assertion "r != 0" failed
SIDE EFFECTS: the files ./bug0.hpp, bug1.cpp, and bug2.cpp are created.

uname -a
Linux lnx-brad.apl.washington.edu 2.6.17-1.2174_FC5 #1 Tue Aug 8 15:30:55 EDT 
2006 i686 i686 i386 GNU/Linux

g++ --version
g++ (GCC) 4.1.1 20070105 (Red Hat 4.1.1-51)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

g++ bug1.cpp bug2.cpp -O1 -o bug
./bug
g++ bug1.cpp bug2.cpp -O2 -o bug
./bug


BUG REPORT:   Cygwin, g++, -O2, static member function, std::string
RUN COMMAND:  ./bug.sh
RESULT:       assertion "r != 0" failed
SIDE EFFECTS: the files ./bug0.hpp, bug1.cpp, and bug2.cpp are created.

uname -a
CYGWIN_NT-5.1 pc-bbell 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin

g++ --version
g++ (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

g++ bug1.cpp bug2.cpp -O1 -o bug
./bug
g++ bug1.cpp bug2.cpp -O2 -o bug
./bug
assertion "r != 0" failed: file "bug2.cpp", line 8
     11 [sig] bug 1924 C:\cygwin\home\Brad\trash\bug.exe: *** fatal error - call
ed with threadlist_ix -1
./bug.sh: line 58:  1924 Hangup                  ./bug