I have updated the mongodb34-rocks from 3.4.4_3 to 3.4.6_3. Upon mongod startup,it will hit segmentation fault and create a core dump upon exit.

# gdb mongod mongod.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...
Core was generated by `mongod'.
Program terminated with signal 11, Segmentation fault.
#0  0x000000000250d085 in mongo::rpc::ServerSelectionMetadata::upconvert (legacyCommand=@0x7fffffffde38, legacyQueryFlags=32767, commandBob=0x7fffffffde38, metadataBob=0x80ac27400) at src/mongo/rpc/metadata/server_selection_metadata.cpp:326
326         }
.gdbinit:2: Error in sourced command file:
No symbol "python" in current context.

(gdb) bt
#0  0x000000000250d085 in mongo::rpc::ServerSelectionMetadata::upconvert (legacyCommand=@0x7fffffffde38, legacyQueryFlags=32767, commandBob=0x7fffffffde38, metadataBob=0x80ac27400) at src/mongo/rpc/metadata/server_selection_metadata.cpp:326
#1  0x000000000250b76a in mongo::rpc::ServerSelectionMetadata::readFromMetadata (metadataElem=@0x80ac273f0) at src/mongo/rpc/metadata/server_selection_metadata.cpp:171
#2  0x000000000251cdbf in boost::gregorian::greg_month::greg_month (this=0x65219c000729ec9b, theMonth=0) at greg_month.hpp:64
#3  0x000000000251d275 in boost::CV::constrained_value<boost::CV::simple_exception_policy<unsigned short, (unsigned short)1400, (unsigned short)10000, boost::gregorian::bad_year> >::assign (this=0x251d275, value=0) at constrained_value.hpp:73
#4  0x0000000004b81252 in ?? ()
#5  0x0000000805c52000 in ?? ()
#6  0x00007fffffffe558 in ?? ()
#7  0x00007fffffffe4e0 in ?? ()
#8  0x0000000002013ee6 in __cxx_global_var_init.4 () at redaction.h:51
Previous frame identical to this frame (corrupt stack?)

OS Version: FreeBSD 11.0-RELEASE-p1

Thanks!