[sword-devel] Reliable crash in regex search with some characters

[Peter von Kaehne]

Searching with regex and some specific characters leads to a reliable
crash. 

The crash seems to be focussed on regec.c (/src/utilfuns/regex.c). It
does not happen with "normal"searches, just with some signs like
questionmarks etc.

The bug had been confusingly entitled with lucene search bug in Jira,
but i have now renamed it. API-168

Peter

peter at peter-ThinkPad-T430:~/Source/sword/src/utilfuns$ gdb diatheke
GNU gdb (GDB) 7.6.1-ubuntu
Copyright (C) 2013 Free Software Foundation, Inc.
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<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/local/bin/diatheke...(no debugging symbols
found)...done.
(gdb) r -b ESV -s regex -k ?
Starting program: /usr/local/bin/diatheke -b ESV -s regex -k ?
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff66e7762 in __regexec (preg=0x7fffffffd740, string=0x889ba0
"In the beginning, God created the heavens and the earth.", nmatch=0,
pmatch=0x0, eflags=0)
    at regexec.c:247
247	regexec.c: No such file or directory.
(gdb) bt
#0  0x00007ffff66e7762 in __regexec (preg=0x7fffffffd740,
string=0x889ba0 "In the beginning, God created the heavens and the
earth.", nmatch=0, pmatch=0x0, eflags=0)
    at regexec.c:247
#1  0x0000000000433113 in sword::SWModule::search(char const*, int, int,
sword::SWKey*, bool*, void (*)(char, void*), void*) ()
#2  0x000000000040a3a0 in doquery(unsigned long, unsigned char, unsigned
char, unsigned long, unsigned char, char const*, char const*, char
const*, char const*, std::ostream*, char const*, signed char) ()
#3  0x0000000000404fad in main ()