Feature #1730: set std::set_terminate for charm++ applications

Gives a meaningful error message in case an application causes a C++
exception.

Change-Id: Id01f44f984158afe3c37df7b4b59a2aa1f8f4b7e

src/ck-core/init.C

@@ -1071,6 +1071,7 @@ void _initCharm(int unused_argc, char **argv)
 	int inCommThread = (CmiMyRank() == CmiMyNodeSize());
 
 	DEBUGF(("[%d,%.6lf ] _initCharm started\n",CmiMyPe(),CmiWallTimer()));
+	std::set_terminate([](){ CkAbort("Unhandled C++ exception in user code.\n");});
 
 	CkpvInitialize(size_t *, _offsets);
 	CkpvAccess(_offsets) = new size_t[32];