[CWB] CQP bug report?

[Eros Zanchetta]

Hi everybody,

I have a strange problem with cqp: whenever I try a %c or %d query on
ITWAC (the full corpus) I get a segmentation fault.

The behaviour is quite consistent, I tried the following:

- I issued the query [word="cane" %c] on ITWAC, cqp immediately
terminated with a "Segmentation fault" message

- I issued the very same query [word="cane" %c] on UKWAC and DEWAC, it
worked

- I repeated the test on a different server (where the corpus had been
re-indexed, it hadn't just been copied) and got the same results, the
query completed successfully on UKWAC and DEWAC and resulted in a
segmentation fault on ITWAC

- I repeated the above steps using the %d flag (i.e. [word="cane" %d]),
and I got the same results

- I repeated everything using both flags (i.e. [word="cane" %cd]), same
results

As a last attempt I tried the query on the split version of ITWAC, the
error manifested itself on ITWAC_20, I repeated the test on two more
servers (with 32 bit versions of CQP) with the same results,
segmentation fault on ITWAC_20. I suppose there's something in there CQP
doesn't like, I just can't figure out what it is.

On only one occasion I got a backtrace (I attached it) of the error
instead of the laconic "segmentation fault" message that normally appears.

I used CQP version 2.2.b97 (on Ubuntu 8.04 32 bit, kernel 2.6.24-23 and
Fedora Core kernel 2.6.22.14) and 2.2.b99 (Ubuntu 8.04 64 bit, kernel
2.6.24-23)

Did anyone experience anything like this or know how to fix this?

Regards,
Eros
-------------- next part --------------
*** glibc detected *** cqp: malloc(): memory corruption: 0x0000000000ad1920 ***
======= Backtrace: =========
/lib/libc.so.6[0x7f9d57ccfa14]
/lib/libc.so.6(__libc_malloc+0x90)[0x7f9d57cd1360]
/lib/libc.so.6(vasprintf+0x3e)[0x7f9d57cc666e]
/lib/libc.so.6(asprintf+0x88)[0x7f9d57ca9098]
/lib/libc.so.6(__assert_fail+0xb8)[0x7f9d57c862a8]
cqp[0x43b709]
cqp[0x40c129]
cqp[0x40cd58]
cqp[0x40cdde]
cqp[0x40d066]
cqp[0x40de20]
cqp[0x424677]
cqp[0x4305c5]
cqp[0x407e45]
cqp[0x4073d0]
cqp[0x4075d8]
/lib/libc.so.6(__libc_start_main+0xf4)[0x7f9d57c791c4]
cqp[0x407169]
======= Memory map: ========
00400000-00462000 r-xp 00000000 09:00 89030766                           /usr/local/bin/cqp
00661000-00665000 rw-p 00061000 09:00 89030766                           /usr/local/bin/cqp
00665000-00c16000 rw-p 00665000 00:00 0                                  [heap]
7f95b0000000-7f95b0021000 rw-p 7f95b0000000 00:00 0
7f95b0021000-7f95b4000000 ---p 7f95b0021000 00:00 0
7f95b5126000-7f95b5133000 r-xp 00000000 09:00 61145109                   /lib/libgcc_s.so.1
7f95b5133000-7f95b5333000 ---p 0000d000 09:00 61145109                   /lib/libgcc_s.so.1
7f95b5333000-7f95b5334000 rw-p 0000d000 09:00 61145109                   /lib/libgcc_s.so.1
7f95b5341000-7f95b8185000 r--p 00000000 09:00 32771190                   /corpora/ukwac/word.corpus.rdx
7f95b8185000-7f97b37d4000 r--p 00000000 09:00 32771191                   /corpora/ukwac/word.corpus.rev
7f97b37d4000-7f97b6618000 r--p 00000000 09:00 32771189                   /corpora/ukwac/word.corpus.cnt
7f97b6618000-7f97c0086000 r--p 00000000 09:00 32771174                   /corpora/ukwac/word.lexicon
7f97c0086000-7f97c2eca000 r--p 00000000 09:00 32771175                   /corpora/ukwac/word.lexicon.idx
7f97c2eca000-7f99be519000 r--p 00000000 09:00 32771173                   /corpora/ukwac/word.corpus
7f99be519000-7f99be583000 rw-p 7f99be519000 00:00 0
7f99be5b8000-7f99bfdac000 r--p 00000000 09:00 17580050                   /corpora/itwac3/word.corpus.rdx
7f99bfdac000-7f9b87315000 r--p 00000000 09:00 17580051                   /corpora/itwac3/word.corpus.rev
7f9b8734a000-7f9b88b3e000 r--p 00000000 09:00 17580049                   /corpora/itwac3/word.corpus.cnt
7f9b88b3e000-7f9b8d506000 r--p 00000000 09:00 17580035                   /corpora/itwac3/word.lexicon
7f9b8d506000-7f9b8ecfa000 r--p 00000000 09:00 17580048                   /corpora/itwac3/word.lexicon.srt
7f9b8ecfa000-7f9b904ee000 r--p 00000000 09:00 17580036                   /corpora/itwac3/word.lexicon.idx
7f9b904ee000-7f9d57a57000 r--p 00000000 09:00 17580034                   /corpora/itwac3/word.corpus
7f9d57a57000-7f9d57a59000 r-xp 00000000 09:00 61145405                   /lib/libdl-2.7.so
7f9d57a59000-7f9d57c59000 ---p 00002000 09:00 61145405                   /lib/libdl-2.7.so
7f9d57c59000-7f9d57c5b000 rw-p 00002000 09:00 61145405                   /lib/libdl-2.7.so
7f9d57c5b000-7f9d57db3000 r-xp 00000000 09:00 61145402                   /lib/libc-2.7.so
7f9d57db3000-7f9d57fb3000 ---p 00158000 09:00 61145402                   /lib/libc-2.7.so
7f9d57fb3000-7f9d57fb6000 r--p 00158000 09:00 61145402                   /lib/libc-2.7.so
7f9d57fb6000-7f9d57fb8000 rw-p 0015b000 09:00 61145402                   /lib/libc-2.7.so
7f9d57fb8000-7f9d57fbd000 rw-p 7f9d57fb8000 00:00 0
7f9d57fbd000-7f9d57ff4000 r-xp 00000000 09:00 61145374                   /lib/libncurses.so.5.6
7f9d57ff4000-7f9d581f3000 ---p 00037000 09:00 61145374                   /lib/libncurses.so.5.6
7f9d581f3000-7f9d581f8000 rw-p 00036000 09:00 61145374                   /lib/libncurses.so.5.6
7f9d581f8000-7f9d58278000 r-xp 00000000 09:00 61145406                   /lib/libm-2.7.so
7f9d58278000-7f9d58477000 ---p 00080000 09:00 61145406                   /lib/libm-2.7.so
7f9d58477000-7f9d58479000 rw-p 0007f000 09:00 61145406                   /lib/libm-2.7.so
7f9d58479000-7f9d58496000 r-xp 00000000 09:00 61145399                   /lib/ld-2.7.so
7f9d58683000-7f9d58686000 rw-p 7f9d58683000 00:00 0
7f9d58693000-7f9d58696000 rw-p 7f9d58693000 00:00 0
7f9d58696000-7f9d58698000 rw-p 0001d000 09:00 61145399                   /lib/ld-2.7.so
7fff60682000-7fff60697000 rw-p 7ffffffea000 00:00 0                      [stack]
7fff607fe000-7fff60800000 r-xp 7fff607fe000 00:00 0                      [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
Aborted