Hi,

There is a small issue with the call to debug_traverse() in \boost\geometry\algorithms\detail\overlay\traverse.hpp at line 359. The issue is that current_iit might point to turn.operations.end so dereference operation is invalid. In some cases this is caught by the microsoft pageheap debugger even though BOOST_GEOMETRY_DEBUG_TRAVERSE is not defined and debug_traverse() is nop.

The following patch is one way to fix the issue.

regards,

Vladimir