Boost C++ Libraries: Ticket #5251: boost graph seg faults inside gdb

attachment set

joao@… — Tue, 01 Mar 2011 15:38:00 GMT

attachment → graph.2.cxx

sample code to reproduce the bug

Jeremiah Willcock — Tue, 01 Mar 2011 18:15:48 GMT

Does this problem happen outside the debugger? Also, could you please try compiling with -D_GLIBCXX_DEBUG and see if that changes the behavior at all?

jalrnc@… — Tue, 01 Mar 2011 22:12:35 GMT

Yes, I've seen it crash outside the debugger before, when printing the number of edges. Even though I cannot make it happen with that specific sample of code.

Your suggestion does not change the behavior.

Here is a piece of info that may provide some clue. I'm using g++ 4.4 for the above. This generates a few warnings concerning deprecated interfaces in boost. That may be related to the problem. I tried using g++ 4.2 and it all works fine. With g++ 4.2 all the compilation warnings related to deprecated interfaces in boost are gone as well.

status changed; resolution set

Jeremiah Willcock — Wed, 02 Mar 2011 19:48:23 GMT

status new → closed
resolution → wontfix

I tried it using GCC 4.1.2, and it also fails; it works using GCC 3.4.6 and GCC 4.6.0 20101120 (you can't print dummy.nedges(), but dummy is reasonable). The list of edges in dummy ends up being circular, leading to an infinite loop. Printing out the two values listed in the bug report within the program works fine (both returning 0), but it does loop in the debugger. I'm not sure what I can do about the problem, though; it is unlikely to be a BGL problem when everything works in the code and passes valgrind and _GLIBCXX_DEBUG. I'm going to close it as "wontfix" since I suspect it's not a BGL issue, even though I can reproduce it myself.

Jeremiah Willcock — Wed, 02 Mar 2011 20:11:53 GMT

The code also works in GCC 4.5.0.