mserver5: sql_mem.c:48: sql_ref_dec: Assertion `r->refcnt > 0' failed.

[monetdb-team]

Date: 2014-09-20 17:56:25 +0200
From: @skinkie
To: SQL devs <>
Version: 11.17.21 (Jan2014-SP3)
CC: @njnes

Last updated: 2014-10-31 14:14:36 +0100

Comment 20174

Date: 2014-09-20 17:56:25 +0200
From: @skinkie

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.68 Safari/537.36
Build Identifier:

I was using double quotes, instead of single quotes and ended up with the following.

Reproducible: Always

Steps to Reproduce:

CREATE TABLE "sys"."kv6" (
"receive" TIMESTAMP,
"message" TIMESTAMP,
"vehicle" TIMESTAMP,
"messagetype" VARCHAR(10),
"operatingday" DATE,
"dataownercode" VARCHAR(10),
"lineplanningnumber" VARCHAR(10),
"journeynumber" INTEGER,
"reinforcementnumber" INTEGER,
"userstopcode" VARCHAR(10),
"passagesequencenumber" INTEGER,
"distancesincelastuserstop" INTEGER,
"punctuality" INTEGER,
"rd_x" INTEGER,
"rd_y" INTEGER,
"blockcode" INTEGER,
"vehiclenumber" INTEGER,
"wheelchairaccessible" VARCHAR(5),
"source" VARCHAR(10),
"numberofcoaches" INTEGER,
"trip_hash" BIGINT
);

select distinct "sum("||lineplanningnumber||") as l"||lineplanningnumber||", " from "sys"."kv6" order by cast(lineplanningnumber as int);

mserver5: sql_mem.c:48: sql_ref_dec: Assertion `r->refcnt > 0' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7ffff17cc700 (LWP 11583)]
0x00007ffff4aac535 in raise () from /lib64/libc.so.6
(gdb) bt
0 0x00007ffff4aac535 in raise () from /lib64/libc.so.6
1 0x00007ffff4aad9b8 in abort () from /lib64/libc.so.6
2 0x00007ffff4aa55f2 in ?? () from /lib64/libc.so.6
3 0x00007ffff4aa56a2 in __assert_fail () from /lib64/libc.so.6
4 0x00007ffff2ee01ba in sql_ref_dec (r=0x7fffe40b8540) at sql_mem.c:48
5 0x00007ffff2e426bd in rel_destroy (rel=0x7fffe40b8540) at rel_select.c:72
6 0x00007ffff2e52411 in _rel_aggr (sql=0x7fffe4005450, rel=0x7ffff17cb658, distinct=0, s=0x7fffe4008290, aname=0x7fffe40b7c80 "concat", args=0x7fffe40b7cf0, f=2) at rel_select.c:3849
7 0x00007ffff2e52fda in rel_aggr (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7d30, f=2) at rel_select.c:3981
8 0x00007ffff2e5181f in rel_binop (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7d30, f=2, ek=...) at rel_select.c:3697
9 0x00007ffff2e55f1e in rel_value_exp2 (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7d30, f=2, ek=..., is_last=0x7ffff17cb41c) at rel_select.c:4710
10 0x00007ffff2e56a32 in rel_value_exp (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7d30, f=2, ek=...) at rel_select.c:4865
11 0x00007ffff2e517b4 in rel_binop (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7ea0, f=2, ek=...) at rel_select.c:3691
12 0x00007ffff2e55f1e in rel_value_exp2 (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7ea0, f=2, ek=..., is_last=0x7ffff17cb5ec) at rel_select.c:4710
13 0x00007ffff2e56a32 in rel_value_exp (sql=0x7fffe4005450, rel=0x7ffff17cb658, se=0x7fffe40b7ea0, f=2, ek=...) at rel_select.c:4865
14 0x00007ffff2e52829 in _rel_aggr (sql=0x7fffe4005450, rel=0x7ffff17cbad0, distinct=0, s=0x7fffe4008290, aname=0x7fffe40b7f50 "concat", args=0x7fffe40b7fc0, f=2) at rel_select.c:3887
15 0x00007ffff2e52fda in rel_aggr (sql=0x7fffe4005450, rel=0x7ffff17cbad0, se=0x7fffe40b8000, f=2) at rel_select.c:3981
16 0x00007ffff2e5181f in rel_binop (sql=0x7fffe4005450, rel=0x7ffff17cbad0, se=0x7fffe40b8000, f=2, ek=...) at rel_select.c:3697
17 0x00007ffff2e55f1e in rel_value_exp2 (sql=0x7fffe4005450, rel=0x7ffff17cbad0, se=0x7fffe40b8000, f=2, ek=..., is_last=0x7ffff17cb9dc) at rel_select.c:4710
18 0x00007ffff2e56a32 in rel_value_exp (sql=0x7fffe4005450, rel=0x7ffff17cbad0, se=0x7fffe40b8000, f=2, ek=...) at rel_select.c:4865
19 0x00007ffff2e56b17 in column_exp (sql=0x7fffe4005450, rel=0x7ffff17cbad0, column_e=0x7fffe40b8080, f=2) at rel_select.c:4878
20 0x00007ffff2e56d7a in rel_column_exp (sql=0x7fffe4005450, rel=0x7ffff17cbad0, column_e=0x7fffe40b8080, f=2) at rel_select.c:4922
21 0x00007ffff2e57919 in rel_select_exp (sql=0x7fffe4005450, rel=0x7fffe40b92b0, sn=0x7fffe40b82e0, ek=...) at rel_select.c:5115
22 0x00007ffff2e5864e in rel_query (sql=0x7fffe4005450, rel=0x0, sq=0x7fffe40b82e0, toplevel=1, ek=..., apply=8) at rel_select.c:5320
23 0x00007ffff2e59fc9 in rel_subquery (sql=0x7fffe4005450, rel=0x0, sq=0x7fffe40b82e0, ek=..., apply=8) at rel_select.c:5699
24 0x00007ffff2e5a0a1 in rel_selects (sql=0x7fffe4005450, s=0x7fffe40b82e0) at rel_select.c:5716
25 0x00007ffff2e42465 in rel_semantic (sql=0x7fffe4005450, s=0x7fffe40b82e0) at rel_semantic.c:264
26 0x00007ffff2d7b088 in sql_symbol2relation (c=0x7fffe4005450, sym=0x7fffe40b82e0) at sql.c:125
27 0x00007ffff2d9dcef in SQLparser (c=0x647330) at sql_scenario.c:2104
28 0x00007ffff78fd7c6 in runPhase (c=0x647330, phase=1) at mal_scenario.c:526
29 0x00007ffff78fd968 in runScenarioBody (c=0x647330) at mal_scenario.c:561
30 0x00007ffff78fdb22 in runScenario (c=0x647330) at mal_scenario.c:590
31 0x00007ffff78ff4c8 in MSserveClient (dummy=0x647330) at mal_session.c:459
32 0x00007ffff739c910 in thread_starter (arg=0x7fffec000a20) at gdk_system.c:506
33 0x00007ffff4e27f3a in start_thread () from /lib64/libpthread.so.0
34 0x00007ffff4b61dad in clone () from /lib64/libc.so.6

4 0x00007ffff2ee01ba in sql_ref_dec (r=0x7fffe40b8540) at sql_mem.c:48
48 assert(r->refcnt > 0);
(gdb) list
43 }
44
45 int
46 sql_ref_dec(sql_ref *r)
47 {
48 assert(r->refcnt > 0);
49 return (--r->refcnt);
50 }
51
52
(gdb) up
5 0x00007ffff2e426bd in rel_destroy (rel=0x7fffe40b8540) at rel_select.c:72
72 if (sql_ref_dec(&rel->ref) > 0)
(gdb) list
67 void
68 rel_destroy(sql_rel *rel)
69 {
70 if (!rel)
71 return;
72 if (sql_ref_dec(&rel->ref) > 0)
73 return;
74 rel_destroy_(rel);
75 }
76

MonetDB 5 server v11.19.0 (64-bit, 64-bit oids)
This is an unreleased version
Copyright (c) 1993-July 2008 CWI
Copyright (c) August 2008-2014 MonetDB B.V., all rights reserved
Visit http://www.monetdb.org/ for further information
Found 31.4GiB available memory, 8 available cpu cores
Libraries:
libpcre: 8.33 2013-05-28 (compiled with 8.33)
openssl: OpenSSL 1.0.1h 5 Jun 2014 (compiled with OpenSSL 1.0.1h 5 Jun 2014)
libxml2: 2.9.1 (compiled with 2.9.1)
Compiled by: skinkie@bigdata.openebs.nl (x86_64-unknown-linux-gnu)
Compilation: gcc -g -Werror -Wall -Wextra -W -Werror-implicit-function-declaration -Wpointer-arith -Wdeclaration-after-statement -Wundef -Wformat=2 -Wno-format-nonliteral -Winit-self -Winvalid-pch -Wmissing-declarations -Wmissing-format-attribute -Wmissing-prototypes -Wold-style-definition -Wpacked -Wunknown-pragmas -Wvariadic-macros -fstack-protector-all -Wstack-protector -Wpacked-bitfield-compat -Wsync-nand -Wjump-misses-init -Wmissing-include-dirs -Wlogical-op -Wunreachable-code
Linking : /usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64

Comment 20181

Date: 2014-09-21 17:40:32 +0200
From: @njnes

fixed cleanup

Comment 20182

Date: 2014-09-21 17:41:10 +0200
From: MonetDB Mercurial Repository <>

Changeset 229116aeddb0 made by Niels Nes niels@cwi.nl in the MonetDB repo, refers to this bug.

For complete details, see http//devmonetdborg/hg/MonetDB?cmd=changeset;node=229116aeddb0

Changeset description:

fixed bug #3582

Comment 20381

Date: 2014-10-31 14:14:36 +0100
From: @sjoerdmullender

Oct2014 has been released.