BUG #3523: plpython crash

The following bug has been logged online:

Bug reference: 3523
Logged by: Julian
Email address: julan(at)internode(dot)on(dot)net
PostgreSQL version: 8.2.4
Operating system: Linux
Description: plpython crash
Details:

-- PostgreSQL 8.2.4 on x86_64-pc-linux-gnu, compiled by GCC
x86_64-pc-linux-gnu-gcc (GCC) 4.1.2 (Gentoo 4.1.2)

--see if this crashes for you.

BEGIN;
CREATE FUNCTION pyfunction(tuple record)
RETURNS "void"
LANGUAGE "plpythonu"
AS
$$
$$
;

CREATE FUNCTION mytrigger ()
RETURNS "trigger"
LANGUAGE "plpgsql"
AS
$$
BEGIN
PERFORM pyfunction(NEW);
END;
$$
;

CREATE TABLE mytable (mycol text) ;

CREATE TRIGGER mytrigger
AFTER INSERT
ON mytable
FOR EACH ROW
EXECUTE PROCEDURE mytrigger();

INSERT INTO mytable SELECT 'test';

ROLLBACK;

---------------------BACKTRACE------------------------
LOG: database system was interrupted at 2007-08-09 03:17:53 EST
LOG: checkpoint record is at 0/5471B260
LOG: redo record is at 0/5471B260; undo record is at 0/0; shutdown TRUE
LOG: next transaction ID: 0/196948; next OID: 608885
LOG: next MultiXactId: 1; next MultiXactOffset: 0
LOG: database system was not properly shut down; automatic recovery in
progress
LOG: redo starts at 0/5471B2B0
LOG: unexpected pageaddr 0/51862000 in log file 0, segment 84, offset
8790016
LOG: redo done at 0/54861E68
LOG: database system is ready
*** glibc detected *** postgres: test test2 [local] INSERT: double free or
corruption (out): 0x00002b7d14e40a30 ***
======= Backtrace: =========
/lib/libc.so.6[0x2b7d14c74b1d]
/lib/libc.so.6(__libc_free+0x76)[0x2b7d14c76146]
/usr/lib64/postgresql/plpython.so[0x2b7d16f32870]
/usr/lib64/postgresql/plpython.so[0x2b7d16f32a77]
/usr/lib64/postgresql/plpython.so(plpython_call_handler+0xbd)[0x2b7d16f3416d
]
postgres: test test2 [local] INSERT(ExecMakeFunctionResult+0xfd)[0x4ff0dd]
postgres: test test2 [local] INSERT(ExecProject+0x1c1)[0x4fd971]
postgres: test test2 [local] INSERT(ExecResult+0x63)[0x50d473]
postgres: test test2 [local] INSERT(ExecProcNode+0xc6)[0x4fd176]
postgres: test test2 [local] INSERT(ExecutorRun+0x10a)[0x4fc47a]
postgres: test test2 [local] INSERT[0x5130cb]
postgres: test test2 [local] INSERT(SPI_execute_plan+0xad)[0x51332d]
/usr/lib64/postgresql/plpgsql.so[0x2b7d16e1c310]
/usr/lib64/postgresql/plpgsql.so[0x2b7d16e1ee43]
/usr/lib64/postgresql/plpgsql.so[0x2b7d16e1e48a]
/usr/lib64/postgresql/plpgsql.so(plpgsql_exec_trigger+0x358)[0x2b7d16e20448]

/usr/lib64/postgresql/plpgsql.so(plpgsql_call_handler+0x152)[0x2b7d16e17c92]

postgres: test test2 [local] INSERT[0x4e7b28]
postgres: test test2 [local] INSERT[0x4e91c2]
postgres: test test2 [local] INSERT(AfterTriggerEndQuery+0x55)[0x4e9545]
postgres: test test2 [local] INSERT[0x582d29]
postgres: test test2 [local] INSERT[0x582ea8]
postgres: test test2 [local] INSERT(PortalRun+0x364)[0x583714]
postgres: test test2 [local] INSERT[0x57f745]
postgres: test test2 [local] INSERT(PostgresMain+0x1110)[0x580b70]
postgres: test test2 [local] INSERT[0x55a3e7]
postgres: test test2 [local] INSERT(PostmasterMain+0x6c1)[0x55afa1]
postgres: test test2 [local] INSERT(main+0x183)[0x51c993]
/lib/libc.so.6(__libc_start_main+0xf4)[0x2b7d14c27374]
postgres: test test2 [local] INSERT[0x43e6c9]
======= Memory map: ========
00400000-00701000 r-xp 00000000 08:19 10261
/usr/bin/postgres
00800000-0080c000 rw-p 00300000 08:19 10261
/usr/bin/postgres
0080c000-009fb000 rw-p 0080c000 00:00 0
[heap]
2b7d1411a000-2b7d14135000 r-xp 00000000 08:19 948791
/lib64/ld-2.5.so
2b7d14135000-2b7d14157000 rw-p 2b7d14135000 00:00 0
2b7d14163000-2b7d141e7000 rw-p 2b7d14163000 00:00 0
2b7d14235000-2b7d14236000 r--p 0001b000 08:19 948791
/lib64/ld-2.5.so
2b7d14236000-2b7d14237000 rw-p 0001c000 08:19 948791
/lib64/ld-2.5.so
2b7d14237000-2b7d1423f000 r-xp 00000000 08:19 571744
/lib64/libpam.so.0.78
2b7d1423f000-2b7d1433e000 ---p 00008000 08:19 571744
/lib64/libpam.so.0.78
2b7d1433e000-2b7d1433f000 rw-p 00007000 08:19 571744
/lib64/libpam.so.0.78
2b7d1433f000-2b7d1437f000 r-xp 00000000 08:19 238686
/usr/lib64/libssl.so.0.9.8
2b7d1437f000-2b7d1447f000 ---p 00040000 08:19 238686
/usr/lib64/libssl.so.0.9.8
2b7d1447f000-2b7d14485000 rw-p 00040000 08:19 238686
/usr/lib64/libssl.so.0.9.8
2b7d14485000-2b7d145d0000 r-xp 00000000 08:19 249759
/usr/lib64/libcrypto.so.0.9.8
2b7d145d0000-2b7d146cf000 ---p 0014b000 08:19 249759
/usr/lib64/libcrypto.so.0.9.8
2b7d146cf000-2b7d146f2000 rw-p 0014a000 08:19 249759
/usr/lib64/libcrypto.so.0.9.8
2b7d146f2000-2b7d146f7000 rw-p 2b7d146f2000 00:00 0
2b7d146f7000-2b7d14778000 r-xp 00000000 08:19 398203
/usr/lib64/libkrb5.so.3.2
2b7d14778000-2b7d14878000 ---p 00081000 08:19 398203
/usr/lib64/libkrb5.so.3.2
2b7d14878000-2b7d1487c000 rw-p 00081000 08:19 398203
/usr/lib64/libkrb5.so.3.2
2b7d1487c000-2b7d14881000 r-xp 00000000 08:19 948786
/lib64/libcrypt-2.5.so
2b7d14881000-2b7d14980000 ---p 00005000 08:19 948786
/lib64/libcrypt-2.5.so
2b7d14980000-2b7d14982000 rw-p 00004000 08:19 948786
/lib64/libcrypt-2.5.so
2b7d14982000-2b7d149b0000 rw-p 2b7d14982000 00:00 0
2b7d149b0000-2b7d149b2000 r-xp 00000000 08:19 948775
/lib64/libdl-2.5.so
2b7d149b2000-2b7d14ab2000 ---p 00002000 08:19 948775
/lib64/libdl-2.5.so
2b7d14ab2000-2b7d14ab4000 rw-p 00002000 08:19 948775
/lib64/libdl-2.5.so
2b7d14ab4000-2b7d14ab5000 rw-p 2b7d14ab4000 00:00 0
2b7d14ab5000-2b7d14b09000 r-xp 00000000 08:19 948796
/lib64/libm-2.5.so
2b7d14b09000-2b7d14c08000 ---p 00054000 08:19 948796
/lib64/libm-2.5.so
2b7d14c08000-2b7d14c0a000 rw-p 00053000 08:19 948796
/lib64/libm-2.5.so
2b7d14c0a000-2b7d14d3c000 r-xp 00000000 08:19 948797
/lib64/libc-2.5.so
2b7d14d3c000-2b7d14e3b000 ---p 00132000 08:19 948797
/lib64/libc-2.5.so
2b7d14e3b000-2b7d14e3e000 r--p 00131000 08:19 948797
/lib64/libc-2.5.so
2b7d14e3e000-2b7d14e40000 rw-p 00134000 08:19 948797
/lib64/libc-2.5.so
2b7d14e40000-2b7d14e45000 rw-p 2b7d14e40000 00:00 0
2b7d14e45000-2b7d14e47000 r-xp 00000000 08:19 571700
/lib64/libcom_err.so.2.1
2b7d14e47000-2b7d14f46000 ---p 00002000 08:19 571700
/lib64/libcom_err.so.2.1
2b7d14f46000-2b7d14f47000 rw-p 00001000 08:19 571700
/lib64/libcom_err.so.2.1
2b7d14f47000-2b7d14f48000 rw-p 2b7d14f47000 00:00 0
2b7d14f48000-2b7d14f6b000 r-xp 00000000 08:19 397952
/usr/lib64/libk5crypto.so.3.0
2b7d14f6b000-2b7d1506a000 ---p 00023000 08:19 397952
/usr/lib64/libk5crypto.so.3.0
2b7d1506a000-2b7d1506c000 rw-p 00022000 08:19 397952
/usr/lib64/libk5crypto.so.3.0
2b7d1506c000-2b7d15073000 r-xp 00000000 08:19 398153
/usr/lib64/libkrb5support.so.0.1
2b7d15073000-2b7d15172000 ---p 00007000 08:19 398153
/usr/lib64/libkrb5support.so.0.1
2b7d15172000-2b7d15173000 rw-p 00006000 08:19 398153
/usr/lib64/libkrb5support.so.0.1
2b7d15173000-2b7d15183000 r-xp 00000000 08:19 948794
/lib64/libresolv-2.5.so
2b7d15183000-2b7d15282000 ---p 00010000 08:19 948794
/lib64/libresolv-2.5.so
2b7d15282000-2b7d15284000 rw-p 0000f000 08:19 948794
/lib64/libresolv-2.5.so
2b7d15284000-2b7d15288000 rw-p 2b7d15284000 00:00 0
2b7d15288000-2b7d1528f000 r-xp 00000000 08:19 948778
/lib64/libnss_compat-2.5.so
2b7d1528f000-2b7d1538e000 ---p 00007000 08:19 948778
/lib64/libnss_compat-2.5.so
2b7d1538e000-2b7d15390000 rw-p 00006000 08:19 948778
/lib64/libnss_compat-2.5.so
2b7d15390000-2b7d153a3000 r-xp 00000000 08:19 948789
/lib64/libnsl-2.5.so
2b7d153a3000-2b7d154a2000 ---p 00013000 08:19 948789
/lib64/libnsl-2.5.so
2b7d154a2000-2b7d154a4000 rw-p 00012000 08:19 948789
/lib64/libnsl-2.5.so
2b7d154a4000-2b7d154a6000 rw-p 2b7d154a4000 00:00 0
2b7d154a6000-2b7d154af000 r-xp 00000000 08:19 948785
/lib64/libnss_nis-2.5.so
2b7d154af000-2b7d155ae000 ---p 00009000 08:19 948785
/lib64/libnss_nis-2.5.so
2b7d155ae000-2b7d155b0000 rw-p 00008000 08:19 948785
/lib64/libnss_nis-2.5.so
2b7d155b0000-2b7d155ba000 r-xp 00000000 08:19 948799
/lib64/libnss_files-2.5.so
2b7d155ba000-2b7d156b9000 ---p 0000a000 08:19 948799
/lib64/libnss_files-2.5.so
2b7d156b9000-2b7d156bb000 rw-p 00009000 08:19 948799
/lib64/libnss_files-2.5.so
2b7d156bb000-2b7d16e0b000 rw-s 00000000 00:08 34897921
/SYSV0052e2c1 (deleted)
2b7d16e0b000-2b7d16e2b000 r-xp 00000000 08:19 49046
/usr/lib64/postgresql/plpgsql.so
2b7d16e2b000-2b7d16f2a000 ---p 00020000 08:19 49046
/usr/lib64/postgresql/plpgsql.so
2b7d16f2a000-2b7d16f2c000 rw-p 0001f000 08:19 49046
/usr/lib64/postgresql/plpgsql.so
2b7d16f2c000-2b7d16f38000 r-xp 00000000 08:19 49050
/usr/lib64/postgresql/plpython.so
2b7d16f38000-2b7d17037000 ---p 0000c000 08:19 49050
/usr/lib64/postgresql/plpython.so
2b7d17037000-2b7d17038000 rw-p 0000b000 08:19 49050
/usr/lib64/postgresql/plpython.so
2b7d17038000-2b7d1712d000 r-xp 00000000 08:19 792544
/usr/lib64/libpython2.4.so.1.0
2b7d1712d000-2b7d1722d000 ---p 000f5000 08:19 792544
/usr/lib64/libpython2.4.so.1.0
2b7d1722d000-2b7d1725b000 rw-p 000f5000 08:19 792544
/usr/lib64/libpython2.4.so.1.0
2b7d1725b000-2b7d17262000 rw-p 2b7d1725b000 00:00 0
2b7d1728f000-2b7d172a4000 r-xp 00000000 08:19 948774
/lib64/libpthread-2.5.so
2b7d172a4000-2b7d173a3000 ---p 00015000 08:19 948774
/lib64/libpthread-2.5.so
2b7d173a3000-2b7d173a4000 r--p 00014000 08:19 948774
/lib64/libpthread-2.5.so
2b7d173a4000-2b7d173a5000 rw-p 00015000 08:19 948774
/lib64/libpthread-2.5.so
2b7d173a5000-2b7d173a9000 rw-p 2b7d173a5000 00:00 0
2b7d173a9000-2b7d173ab000 r-xp 00000000 08:19 948790
/lib64/libutil-2.5.so
2b7d173ab000-2b7d174aa000 ---p 00002000 08:19 948790
/lib64/libutil-2.5.so
2b7d174aa000-2b7d174ac000 rw-p 00001000 08:19 948790
/lib64/libutil-2.5.so
2b7d174ac000-2b7d174ed000 rw-p 2b7d174ac000 00:00 0
2b7d174ee000-2b7d17560000 rw-p 2b7d174ee000 00:00 0
2b7d1758d000-2b7d17599000 r-xp 00000000 08:19 822805
/lib64/libgcc_s.so.1
2b7d17599000-2b7d17699000 ---p 0000c000 08:19 822805
/lib64/libgcc_s.so.1
2b7d17699000-2b7d1769a000 rw-p 0000c000 08:19 822805
/lib64/libgcc_s.so.1
2b7d18000000-2b7d18021000 rw-p 2b7d18000000 00:00 0
2b7d18021000-2b7d1c000000 ---p 2b7d18021000 00:00 0
7fff96978000-7fff96990000 rw-p 7fff96978000 00:00 0
[stack]