[LLVMdev] Possible bug in llvm-gcc

William Lynch wlynch at wlynch.cx
Sat Nov 13 11:41:57 CST 2010


Hi all,

I was on stackoverflow when I came across this question:
http://stackoverflow.com/questions/4173107/llvm-gcc-stdallocator-bug. It's
causing a segmentation fault when compiled with llvm-g++ but not when
compiled with g++. It also works under OS X but not under Ubuntu 10.10.

I've reduced a test case down to the following:

#include <vector>

struct blub {};
struct intvec : public std::vector<int>, public blub {};

int main() {
    intvec d;
    intvec e(d);
}

The last interesting comment is that if I add the following copy constructor
(as well as a default constructor), it works:

    intvec(const intvec & other) : std::vector<int>(other)
    {}

If I add this copy constructor (and the same default constructor), it will
still seg fault.

    intvec(const intvec & other) : std::vector<int>(other), blub(other)
    {}


Anyone have any ideas about this?
Thanks,
Bill Lynch
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