Nebula-graphd crashes

This statement crashes nebula-graphd. How can I provide more information (compile using address sanitizer, …)?

(GO FROM "wzgnalvbxadtqlqccllq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "plsqkxagdlaqdziyebyj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mjswfsktrhovcswisrec" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ejvepikelirmpomjvtrx" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "drrjgprdofofbgyzlppe" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "upwmpekkzgyjvxgdgnns" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bqdcfyvbtwbubysncbwr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "boczhukkhnvlucrezugc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bfkwdziyeqjdydxigbji" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ixafacyfqcxlzfefhnlo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wnvidrzkgybqpyvbmrms" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "usnizzckxjhmxuoaydrh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "pfqkwlnwnhqnfsntephd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "syryvxxdcboijmjqtfzi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "sfbxlcuzvgbnpydokrfg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wpiotneiyaywrhklpnsi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vcbraeaoysmnzndkbnax" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "exueutudqtphxtzzlatx" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "skjlxrmyzxzktbyzovxw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kaorotarkslrucbprcni" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rgqnavgdminwetiwgiop" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jprueanclfpnpfodprbo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tckqqjulbjzjkhogtxno" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "utanubebejbsyhptpxjz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rtimfwzeztxkhoebhsit" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "oktfctangtjvkowpuyjf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ntdhbwdqifsiybbadzwg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qaeecfxenhrifymflajg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rtfjoivitwwrphdupzun" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "exqcctqjldkrjznyhikt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "krnzowumgljosoxzofkf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mjupjorxmbkegqfajnya" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zbepfpqmwkxzactfspey" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "babufyibktzechfudiyf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vtzixyjwysskeelfnsuf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fkwywpsgnflfutdnzpbw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jyqsxytqnazhcjxazepg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nmfupfmzngdahveqouzt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cmkqswvfdvsfqagunylg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tacidfodrbqeoddtqluc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "pozjcazdpfursfgxuays" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zfflzeakhzfeudotvdwo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bctkgowsmxvzfpwotojm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "yjoedpwtioqgbgotykcw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qatvggmtihppfguazwlh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nsiawkkdhoreyjewsrah" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qmeauxduwnovmvjqcdcx" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qewapttiphletqpkyana" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mtzkeadnvskqnitheqoj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "oeoqyqmllavlfsryaysh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ieyfoopssgovltkvhryg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "faojdbrzqrhrlyuayequ" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zngmhegpoymcupidkcuf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "whieacgnnievyylpxymw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "czledrzfjessyozqieir" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ujrihdijmkybbfbohxyo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mpflkufgitglyfxvvrcg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "yzzvbyznzhtrjxvipsmf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jjdvvsmrsuizrpqnnokj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kwbrzwzkffdaoqpfdjsd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "txpxryqxrjxsodszxmjo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "pxhrnaazzkvhjcysrnra" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "drbcbkywlwcgbkdacwsb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zutvpjesvthbhxayrjea" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wwaqwjcmtxnzlnuvbbdm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gblqzcivvargzpjepwlj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xapxyfpmrefiyckfoenj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ljaoqkernrxogoethklj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gurevpnhxkqwsuuilhpu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "oaqawlftjfpbhgdbpitq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nwyjzwckcgyxkjqfzzqd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fkgpamvlufswcmzocsma" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "flqhuxkdfbuuecszafce" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mfpcotahxpmozmikdetb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rgvjmxwaekmlloqhcewv" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tlqcedtcxulcrhnmremk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ofabrdtbvisjnvhdnxin" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qtkvylqzjdnnwylhngsf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rekizzsgfjbkadkwammc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uuckbufsonsthmhwvfoh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "swnizicmtdtaccldpxwr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dzfpnkqcykkaydotnuws" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ogyidgkuibflxiulbcxu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "hjjljlnhruqfjgnlolzg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mmoppfozutdvleawxaxq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "znkzlzzvbllueiazwhjd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vbphxomshkkcovdnryup" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dpvtucewijxwfpomslqd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ltergtcroeblfwtneqim" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cnsqagzchmrexwdwxlkr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dzpyhxowawyauzymhezg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "szyripqdvttnlbitlxfr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jtexoyiqtchgdriywcal" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jrzkxnjxfuudbrtfvqsk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cnowfriaqrphbvmiiqst" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "idpxuonbhvyvnpteugtw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dyqbaoqpcocxqafthhjl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "crvcqrmmbmqkybwfrcwn" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bqqsjowvozsizeellpgk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tpfcznxlfhhgpoxgofpg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kczcmvnqjodboxvqlygy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bmvpurhvrhhxzgupjppn" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "urflsvvykzazlbvctldw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "svbteqrxrotdqfenlqqi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "odrjtyvpbrgrjnltpqvj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ybtaphpdwltysmkacviw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jdsuosgzbcwbqcwynpve" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fqmvdffimhwunxphqiaj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bznaoxtndulkebsmfoqk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jhbrejqnlynwtcfrghts" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "trpxcantxikgpstgamjk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "psyczmdmqfrgdlazbapl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dgvpgzoygwabcgujfqrb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zjbjruhccxrmoewcgais" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jjhcvsemmsbrxwofexyl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uimmhpoxwmswpgeaaoyi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ybendshhkikhcqcjdcew" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dakgfueqkismvdmbyitu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fujfnyyppzxxlcrskptj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uexgvfttxxtbcfduotjz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vipbdtoqntuaunpgenhn" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rgenvekhncbgdeqdgluj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cahgjqoiucicfrmpmqsu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vnoxqlltlkvxuuzzmwez" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gcipmpxemvsvaajloyng" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "poufrudwvyxuizjcpsfj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "glojlrphykyiaqjwaung" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nmgxmynqughytedojhne" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "orhrtrerwuywhjeooigh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gtbsthxmpycharkmfymr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jnphtogciriufyolkgyn" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "pisjyzmjjsjcqwvsrryb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xzzutdzydyzdzpluwutl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fitmsnpaqmztgmxkwykp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xmpntckeaopniucfvyxp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bhvoffflrmievmlaeapt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ufsolzpmajjyjnclojdz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "oyaoyadqvngznysiqwal" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vonkrxcfkwbxpyxqsroj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jhroejnvxihgrbsuahdr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qxondxdjprvjmnknmihl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "miwvgsuzafygcxzyhnpd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "yblmxrehcenkpsfkgcgm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xrkdfojoynvuocgfcdet" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bgzvjokvmfmbqqhnowgk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ntxrrrlzwvhgidxskudm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "glbvncvplbwkiwnxntsm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bxjvounwgiipjwnkthia" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vixaehaoaabyupptucml" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "czgorurlvlogzdptfstr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "lqtxneazdbrjfvluhrvc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jqwmixegwnmnjdixxjtw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ohgdijfiersumkxnlyot" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "akaezndhvwkouzlwrlwe" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "sviovblqhuxkcxpgxwng" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qfnwiwqskyelsizdsxjz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zhbzoxcumyszginwjuzy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bjkzkvzsolpyjaohvdfy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tqjruhyqpiprxnepivux" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mffqmchmcetgtovwpsrq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uptxktsckqarbqtlonke" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ybpxvywfdhypvzppjoec" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "eejzzredszzwskuaqmlj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gsotzmdqgvbipbzxukvt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "erhrftatvyxtdwnteakb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "iwdrhfbiymdrgskjhdrz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ezcdxxtcybiwvpcvikjd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vbunprdjxyvqrfjdkrok" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uldezlyxsqpjkzlfjcba" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kwolurfhsrbthrrlnifa" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kebgnqmpgfqksasllxex" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "veuitmeuyxhmhsrmxodb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rzhmcxohvkseqvlmuefo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "inmtnltslukefceimbce" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "coumyjbsnvvfuuhtsvsy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tvtogtukehgmorkiiitr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "clydklkqucmzjxlevimq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "negdafqbgmbsjcmdxmio" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jpltgzgiqmxfdqwkvnwg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dyibtgzokchrpfzhucry" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vboizxdgbljyhsakvncz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ngppakjyasikwtasllvu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zyuppgkpuvmatbctedjt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xbpdckejcycovceckbat" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bxavaaiewerjrmxbwbwy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "witpnvdjqiqnoxopbsxo" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "kychmdaotynygkrpapkt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "sxmgaxdfcciszjugknwx" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dncleipkepdbhsrqzuiz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ctroobhsmamqjcdxincc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "iwjvrgvakxqomwgenukp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bjmsylnulatzkwgjesqy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "edwghputpapirtdnrskz" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gzgccjtmbvgurwgrwkmr" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tfurmkfdajadylzhvdow" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nzztwqypjekbsvcdmrvk" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mgavpbhlsejhozyscacv" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "uqxsaeviytfmraewjwzt" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "bnqxagljssecpxsechmw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fvolmnpnqpnbqxdhenbd" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nxkcddxfihihxcrcgfpl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "mtjkftucriyuwodzfrfu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dxytbnxdlnthyowtjstp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cxzylyydntczemhnzxam" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jgfxfvuztpktrjkprjrh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nzklruqddleziluaqmlw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rkpgrpcxixpzxpzozksi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ckgrrmazlggjjzimzzdf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "thjozbxagrsymmnjnfpy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jtsxdmgoqcmaahcnqhkm" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "nbokmtlgqjfpcncyoqnp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "zayxicwtdastzmzwulzb" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "vptknouovmaakflpzyuw" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qsrqliutycvcvsnpqpyx" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qqctmauyvuvjnrxmexri" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "csljsxatkjpttuunxuab" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "oojedndfpevexydewwtu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "abpqzsejjfuhwjxuhrzy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "slxgonozbkxedspnwgqy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "dhabdvrrtogmqvexzkbs" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jdpzetkeqexawazmklmp" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ktdnpkowarzalrlzyizj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "crdtennlbteyswdxiagc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "yroinnnuqcussjbejfpi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fnlylmprgcidvgckpezq" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jalimeceoodbfnykrlhg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "tmhasidnnmigqddgjfcf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wyjnriophtyxissnhzer" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "thyiahnxipvgudoybhkj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "qsenrriewsrqwjtgfxcl" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
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(GO FROM "kpgcvbrchezskhsmqdxy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
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(GO FROM "lxdqikgmaruzddwrmuri" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "hdckjtageohipgpgkbxg" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "elzlcbobscyysjtvwzbc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
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(GO FROM "bdfnddwxbckftofpyqps" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
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(GO FROM "iibfvmqithludbbknovj" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "rdoycykpscxsyoaibiic" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "flawbxsdciirmkuxzkia" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "poidwjsexclaevompjfy" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wtwifjeuuefgjtudnpht" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "buhimqscwdzyefbkwoxi" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "ooesvzoouxyncrnnwzwe" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "aokooctxqnjlljiepuly" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "epuhbznxjyofqnyaidsh" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "cvgxqlnfxnlkoofmdnog" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wbjqznrdisuhifkkyunc" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "jrgwmsgnzjqerkqyiwyf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "xkgefutqxgbnwmzawryu" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "lcxbrnvlechyqfddzbez" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gjxmwvrxikvybklwecze" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "gwyuyayatpwvipcxtcav" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "wyyqzvaageunmavdoxpf" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "fxnyjwduewmkyfsctspe" OVER owner YIELD owner._dst as post | LIMIT 3) UNION
(GO FROM "enquvvfjexcplnckfxsf" OVER owner YIELD owner._dst as post | LIMIT 3)

Hello,
Nebula Graph generates logs in <install Dir>/logs/nebula-graphd.INFO
It would be helpful if you can post nebula-graphd.INFO and nebula-metad.INFO here.

@Aiee
The logfiles are not very helpful.
nebula-graphd coredumps - but ASAN does not report anything.

The backtrace from the coredump is here (can’t attach a TXT file).:
http://doppelbauer.name/stacktrace.txt

I can provide the binary and the coredump files.

Did you specify the CMAKE_BUILD_TYPE in cmake? If you didn’t set it yourself, the default type is debug, which should give you enough info in the logs.

I would also ask a few questions to address the problem:

  1. What’s the version of Nebula Graph you are using?
  2. Is the problem reproducible?
  3. Your hardware specs?
  4. The approximate scale of your dataset?

Maybe the nebula-graph was OOM, you can execute dmesg |grep nebula-graphd

Nebula Graph 2.0.1 (not git-master)
The issue is 100% reproducible: starting graphd, execute UNION → coredump
core-dump machine is cheap - but it happend also on a 64GB server.
dmesg does not show anything.

CMAKE (disabled ASAN to get coredumps)

cmake3 -DENABLE_BUILD_STORAGE=off -DENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON -DENABLE_FRAME_POINTER=ON -DNEBULA_COMMON_REPO_TAG=v2.0.1 -DNEBULA_STORAGE_REPO_TAG=v2.0.1 ..
cmake3 -DENABLE_BUILD_STORAGE=off -DENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_FRAME_POINTER=ON -DNEBULA_COMMON_REPO_TAG=v2.0.1 -DNEBULA_STORAGE_REPO_TAG=v2.0.1 ..

The backtrace is huge.
If it helps I can provide you the binary (CentOS7) and the coredump.

Could you provide the stderr.log under the /usr/local/nebula/logs

Since you set -DENABLE_BUILD_STORAGE=off, did you build storage separately? Could you please verify the status of nebula service before sending the query to it? You can check it by running /usr/local/nebula/scripts/nebula.service status all

graphd-stdout.log: empty
graphd-stderr.log: empty
nebula-graphd.cuda.root.log.INFO.20210427-051316.26682:

Log file created at: 2021/04/27 05:13:16
Running on machine: cuda
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
I0427 05:13:16.494024 26682 GraphDaemon.cpp:110] Starting Graph HTTP Service
I0427 05:13:16.497908 26683 WebService.cpp:131] Web service started on HTTP[19669], HTTP2[19670]
I0427 05:13:16.497992 26682 GraphDaemon.cpp:124] Number of networking IO threads: 4
I0427 05:13:16.498015 26682 GraphDaemon.cpp:133] Number of worker threads: 4
I0427 05:13:16.498679 26682 MetaClient.cpp:50] Create meta client to "127.0.0.1":9559
I0427 05:13:16.499960 26682 GflagsManager.cpp:140] Prepare to register 6 gflags to meta
I0427 05:13:16.514190 26682 MetaClient.cpp:2828] Register gflags ok 6
I0427 05:13:16.520476 26682 MetaClient.cpp:99] Register time task for heartbeat!
I0427 05:13:16.521780 26682 GraphDaemon.cpp:164] Starting nebula-graphd on 0.0.0.0:9669
I0427 05:13:36.984081 26704 GraphService.cpp:33] Authenticating user harmony from 192.168.1.215:56508
I0427 05:13:36.987319 26703 SwitchSpaceExecutor.cpp:43] Graph switched to `harmony', space id: 128
I0427 05:13:36.991364 26702 MetaClient.cpp:3053] Load leader of "127.0.0.1":9779 in 1 space
I0427 05:13:36.991413 26702 MetaClient.cpp:3056] Load leader ok
I0427 05:13:37.058279 26702 GraphService.cpp:33] Authenticating user harmony from 192.168.1.215:56508
I0427 05:13:37.060977 26703 SwitchSpaceExecutor.cpp:43] Graph switched to `harmony', space id: 128

I have only compiled /usr/local/nebula/bin/nebula-graphd
nebula-metad and nebula-storaged where taken from nebula-graph-2.0.1.el7.x86_64.rpm

Thank you for the stack information. Let’s analyze the stack.

If I can contribute, please don’t hesitate.
Best wishes!

Thanks for your feedback,It’s because the recursion is too deep and the stack space is not enough so overflowing. We will optimize this process.