db.s_1234 does not exist anymore; a call like this crashes the shell

Object.bsonsize(db.s_1234.findOne())
Fri Oct 29 17:56:47 mongo got signal 11 (Segmentation fault), stack trace:

Fri Oct 29 17:56:47 0x473952 0x7f19c54a61e0 0x56379f 0x4e7cc9 0x5aac2f 0x5bdc29 0x5ab7e6 0x5689df 0x568928 0x568811 0x4fcd97 0x4775db 0x478a66 0x7f19c5492c4d 0x4727d9
mongo(_Z12quitAbruptlyi+0x3c2) [0x473952]
/lib/libc.so.6(+0x321e0) [0x7f19c54a61e0]
mongo(JS_InstanceOf+0x1d) [0x56379f]
mongo(ZN5mongo13bson_get_sizeEP9JSContextP8JSObjectjPlS4+0x69) [0x4e7cc9]
mongo(js_Invoke+0xe65) [0x5aac2f]
mongo(js_Interpret+0x11433) [0x5bdc29]
mongo(js_Execute+0x418) [0x5ab7e6]
mongo(JS_EvaluateUCScriptForPrincipals+0xb5) [0x5689df]
mongo(JS_EvaluateUCScript+0x5a) [0x568928]
mongo(JS_EvaluateScript+0x80) [0x568811]
mongo(_ZN5mongo7SMScope4execERKSsS2_bbbi+0x117) [0x4fcd97]
mongo(_Z5_mainiPPc+0x1d2b) [0x4775db]
mongo(main+0x26) [0x478a66]
/lib/libc.so.6(__libc_start_main+0xfd) [0x7f19c5492c4d]
mongo(_ZNSt15basic_streambufIcSt11char_traitsIcEE6xsputnEPKcl+0x49) [0x4727d9]