stack trace fix

git-svn-id: http://svn.clifford.at/openscad/trunk@392 b57f626f-c46c-0410-a088-ec61d464b74c

src/openscad.cc

@@ -29,6 +29,7 @@
 
 #ifdef ENABLE_CGAL
 #include "cgal.h"
+#include <CGAL/assertions_behaviour.h>
 #endif
 
 #include <QApplication>
@@ -70,6 +71,11 @@ int main(int argc, char **argv)
 {
 	int rc = 0;
 
+#ifdef ENABLE_CGAL
+	// Causes CGAL errors to abort directly instead of throwing exceptions
+  // (which we don't catch). This gives us stack traces without rerunning in gdb.
+	CGAL::set_error_behaviour(CGAL::ABORT);
+#endif
 	initialize_builtin_functions();
 	initialize_builtin_modules();