It appears to be a bad pointer, somehow a chunk of bad memory that was once a wxBrush is being interpreted as a NETINFO_ITEM and all hell breaks loose.
Valgrind trace of the failure: http://pastebin.com/ax6RDF3u Anybody have ideas on how to proceed at this point? On Mon, 2014-08-11 at 23:10 -0400, Andrew Zonenberg wrote: > This has been happening pretty regularly to me, this is the fourth time > it's happened to me on this board alone. I finally managed to trigger it > in a debug build so here's some info. > > It appears that the bug happens when the ratsnest calculator resizes a > std::vector to an absurd size (in this case, about 88 million 496-byte > RN_NET objects, which comes out to about 40 GB). > > The code triggering the issue is: > > for( const D_PAD* pad = module->Pads().GetFirst(); pad; pad = > pad->Next() ) > { > net = pad->GetNetCode(); > > if( net < 1 ) // do not process unconnected items > continue; > > if( net >= (int) m_nets.size() ) // Autoresize > m_nets.resize( net + 1 ); > > m_nets[net].AddItem( pad ); > } > > Tracing back, pad->GetNetCode() must have returned 88490000. I'm not > sure how this happened, though... my laptop froze for unrelated reasons > right as I was stepping through the code and I wasn't able to figure out > what is going on. > > Steps to reproduce: > > Open pcbnew with an existing board that has some unassigned footprints > Switch to GAL > Open cvpcb > Assign to existing passive library footprint > Import to pcbnew > No crash > Make new footprint > Save it in library > Assign to component in cvpcb > Move a passive around > Import netlist > Crash > > #0 0x00007ffff638fb90 in __cxa_throw () > from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 > #1 0x00007ffff63900dd in operator new(unsigned long) () > from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 > #2 0x00007fffd768107e in __gnu_cxx::new_allocator<RN_NET>::allocate > (this=0x3081488, __n=88490001) at /usr/include/c > ++/4.7/ext/new_allocator.h:94 > #3 0x00007fffd767d32d in std::_Vector_base<RN_NET, > std::allocator<RN_NET> >::_M_allocate (this=0x3081488, __n=88490001) > at /usr/include/c++/4.7/bits/stl_vector.h:169 > #4 0x00007fffd7676aef in std::vector<RN_NET, std::allocator<RN_NET> > >::_M_fill_insert (this=0x3081488, __position=..., __n=88489817, > __x=...) at /usr/include/c++/4.7/bits/vector.tcc:481 > #5 0x00007fffd7670136 in std::vector<RN_NET, std::allocator<RN_NET> > >::insert (this=0x3081488, __position=..., __n=88489817, __x=...) > at /usr/include/c++/4.7/bits/stl_vector.h:1004 > #6 0x00007fffd7669f05 in std::vector<RN_NET, std::allocator<RN_NET> > >::resize (this=0x3081488, __new_size=88490001, __x=...) > at /usr/include/c++/4.7/bits/stl_vector.h:687 > #7 0x00007fffd7664193 in RN_DATA::Add (this=0x3081480, aItem=0x4703bd0) > at > /nfs/home/azonenberg/Documents/local/programming/3rdparty/kicad/pcbnew/ratsnest_data.cpp:858 > #8 0x00007fffd761fff5 in BOARD::Add (this=0x307bd60, > aBoardItem=0x4703bd0, aControl=1) > at > /nfs/home/azonenberg/Documents/local/programming/3rdparty/kicad/pcbnew/class_board.cpp:717 > #9 0x00007fffd76241be in BOARD::ReplaceNetlist (this=0x307bd60, > aNetlist=..., aDeleteSinglePadNets=true, aReporter=0x7fffffffb9a0) > at > /nfs/home/azonenberg/Documents/local/programming/3rdparty/kicad/pcbnew/class_board.cpp:2252 > #10 0x00007fffd74fc547 in PCB_EDIT_FRAME::ReadPcbNetlist > (this=0x10e04d0, aNetlistFileName=..., aCmpFileName=..., > aReporter=0x7fffffffb9a0, aChangeFootprints=false, > aDeleteUnconnectedTracks=false, aDeleteExtraFootprints=false, > aSelectByTimeStamp=false, aDeleteSinglePadNets=true, > aIsDryRun=false) > at > /nfs/home/azonenberg/Documents/local/programming/3rdparty/kicad/pcbnew/netlist.cpp:112 > #11 0x00007fffd7435130 in DIALOG_NETLIST::OnReadNetlistFileClick > (this=0x7fffffffcae0, event=...) > at > /nfs/home/azonenberg/Documents/local/programming/3rdparty/kicad/pcbnew/dialogs/dialog_netlist.cpp:202 > #12 0x00007ffff69273f6 in > wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, > wxEvtHandler*, wxEvent&) () > from /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0 > #13 0x00007ffff692779f in > wxEvtHandler::SearchDynamicEventTable(wxEvent&) () > from /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0 > #14 0x00007ffff6927852 in wxEvtHandler::ProcessEvent(wxEvent&) () > from /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0 > > > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : [email protected] > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp -- Andrew Zonenberg PhD student, security group Computer Science Department Rensselaer Polytechnic Institute http://colossus.cs.rpi.edu/~azonenberg/
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