Positional projection on query with $all crashes server

db.foo.find({"a":{$all:[1]}},{"a.$":1})

Process 19406 launched: './mongod' (x86_64)

./mongod --help for help and startup options

2014-01-22T09:36:14.983-0800 [initandlisten] MongoDB starting : pid=19406 port=27017 dbpath=/data/db 64-bit host=fifiteener.local

2014-01-22T09:36:14.983-0800 [initandlisten] 

2014-01-22T09:36:14.983-0800 [initandlisten] ** NOTE: This is a development version (2.5.5-pre-) of MongoDB.

2014-01-22T09:36:14.983-0800 [initandlisten] **       Not recommended for production.

2014-01-22T09:36:14.983-0800 [initandlisten] 

2014-01-22T09:36:14.983-0800 [initandlisten] ** WARNING: soft rlimits too low. Number of files is 256, should be at least 1000

2014-01-22T09:36:14.983-0800 [initandlisten] 

2014-01-22T09:36:14.983-0800 [initandlisten] db version v2.5.5-pre-

2014-01-22T09:36:14.983-0800 [initandlisten] git version: f564c31f4e00d53158e7dd26a7ccf013478761ea

2014-01-22T09:36:14.983-0800 [initandlisten] build info: Darwin fifiteener.local 13.0.2 Darwin Kernel Version 13.0.2: Sun Sep 29 19:38:57 PDT 2013; root:xnu-2422.75.4~1/RELEASE_X86_64 x86_64 BOOST_LIB_VERSION=1_49

2014-01-22T09:36:14.983-0800 [initandlisten] allocator: tcmalloc

2014-01-22T09:36:14.983-0800 [initandlisten] options: {}

2014-01-22T09:36:14.984-0800 [initandlisten] journal dir=/data/db/journal

2014-01-22T09:36:14.985-0800 [initandlisten] recover begin

2014-01-22T09:36:14.985-0800 [initandlisten] recover lsn: 0

2014-01-22T09:36:14.985-0800 [initandlisten] recover /data/db/journal/j._0

2014-01-22T09:36:14.987-0800 [initandlisten] recover cleaning up

2014-01-22T09:36:14.987-0800 [initandlisten] removeJournalFiles

2014-01-22T09:36:14.988-0800 [initandlisten] recover done

2014-01-22T09:36:15.001-0800 [initandlisten] waiting for connections on port 27017

2014-01-22T09:36:17.238-0800 [initandlisten] connection accepted from 127.0.0.1:53513 #1 (1 connection now open)

Process 19406 stopped

* thread #2: tid = 0xa66e3, 0x000000010040e5d6 mongod`mongo::ParsedProjection::_hasPositionalOperatorMatch(query=0x0000000104a5d500, matchfield=0x000000010511aa88) + 38 at parsed_projection.cpp:282, stop reason = EXC_BAD_ACCESS (code=1, address=0x10)

    frame #0: 0x000000010040e5d6 mongod`mongo::ParsedProjection::_hasPositionalOperatorMatch(query=0x0000000104a5d500, matchfield=0x000000010511aa88) + 38 at parsed_projection.cpp:282

   279 	    bool ParsedProjection::_hasPositionalOperatorMatch(const MatchExpression* const query,

   280 	                                                       const std::string& matchfield) {

   281 	        if (query->isLogical()) {

-> 282 	            for (unsigned int i = 0; i < query->numChildren(); ++i) {

   283 	                if (_hasPositionalOperatorMatch(query->getChild(i), matchfield)) {

   284 	                    return true;

   285 	                }

(lldb) bt

* thread #2: tid = 0xa66e3, 0x000000010040e5d6 mongod`mongo::ParsedProjection::_hasPositionalOperatorMatch(query=0x0000000104a5d500, matchfield=0x000000010511aa88) + 38 at parsed_projection.cpp:282, stop reason = EXC_BAD_ACCESS (code=1, address=0x10)

    frame #0: 0x000000010040e5d6 mongod`mongo::ParsedProjection::_hasPositionalOperatorMatch(query=0x0000000104a5d500, matchfield=0x000000010511aa88) + 38 at parsed_projection.cpp:282

    frame #1: 0x000000010040c4f5 mongod`mongo::ParsedProjection::make(spec=0x0000000104948300, query=0x0000000104a5d500, out=0x000000010511adf0) + 1269 at parsed_projection.cpp:222

    frame #2: 0x00000001003ec15e mongod`mongo::CanonicalQuery::init(this=0x0000000104a8c220, lpq=<unavailable>) + 286 at canonical_query.cpp:437

    frame #3: 0x00000001003ebec9 mongod`mongo::CanonicalQuery::canonicalize(qm=<unavailable>, out=0x000000010511b1f8) + 137 at canonical_query.cpp:193

    frame #4: 0x00000001004093ee mongod`mongo::newRunQuery(m=<unavailable>, q=<unavailable>, curop=0x0000000104962c00, result=0x000000010495c210) + 1358 at new_find.cpp:387

    frame #5: 0x00000001002be10b mongod`mongo::assembleResponse(mongo::Message&, mongo::DbResponse&, mongo::HostAndPort const&) [inlined] mongo::receivedQuery(this=0x0000000100778557, isArray=false, full=false) + 195 at instance.cpp:265

    frame #6: 0x00000001002be048 mongod`mongo::assembleResponse(m=<unavailable>, dbresponse=0x000000010511bb50, remote=0x000000010511bb00) + 1464 at instance.cpp:428

    frame #7: 0x000000010000efc7 mongod`mongo::MyMessageHandler::process(this=<unavailable>, m=0x000000010511bd28, port=0x000000010491acd0, le=0x000000010491bbd0) + 183 at db.cpp:201

    frame #8: 0x00000001006e98b1 mongod`mongo::PortMessageServer::handleIncomingMsg(arg=0x0000000104a6d860) + 913 at message_server_port.cpp:209

    frame #9: 0x00000001007680b1 mongod`thread_proxy(param=<unavailable>) + 177 at thread.cpp:121

    frame #10: 0x00007fff86eca899 libsystem_pthread.dylib`_pthread_body + 138

    frame #11: 0x00007fff86eca72a libsystem_pthread.dylib`_pthread_start + 137

    frame #12: 0x00007fff86ecefc9 libsystem_pthread.dylib`thread_start + 13

(lldb)