Description:
------------
I've got a Joomla site which makes PHP sigbus regularly. Backtrace of Core files have two different output (about 50-50% of cases).

Problem looks very similar to this one:

http://zecrazytux.net/troubleshooting/php-sigbus-crash-prestashop

Expected result:
----------------
No crash.

Actual result:
--------------
Core was generated by `php-fpm: pool p16471         '.
Program terminated with signal 7, Bus error.
#0  lex_scan (zendlval=0x7fff1207c4a8) at Zend/zend_language_scanner.c:2129
2129                    switch (yych) {
#0  lex_scan (zendlval=0x7fff1207c4a8) at Zend/zend_language_scanner.c:2129
#1  0x000000000071b040 in zendlex (zendlval=0x7fff1207c4a0) at /path/php-5.3.26/Zend/zend_compile.c:4976
#2  0x0000000000704abe in zendparse () at /path/php-5.3.26/Zend/zend_language_parser.c:3285
#3  0x00000000007104a8 in compile_file (file_handle=0x7fff1207c5d0, type=2) at Zend/zend_language_scanner.l:364
#4  0x000000000076a3cf in ZEND_INCLUDE_OR_EVAL_SPEC_VAR_HANDLER (execute_data=0x2715348)
    at /path/php-5.3.26/Zend/zend_vm_execute.h:8610
#5  0x0000000000758828 in execute (op_array=0x24a2150) at /path/php-5.3.26/Zend/zend_vm_execute.h:107
#6  0x00000000007331ca in zend_execute_scripts (type=8, retval=<value optimized out>, file_count=3)
    at /path/php-5.3.26/Zend/zend.c:1259
#7  0x00000000006e183e in php_execute_script (primary_file=<value optimized out>) at /path/php-5.3.26/main/main.c:2316
#8  0x00000000007c2218 in main (argc=<value optimized out>, argv=<value optimized out>)
    at /path/php-5.3.26/sapi/fpm/fpm/fpm_main.c:1929


Core was generated by `php-fpm: pool p16471         '.
Program terminated with signal 7, Bus error.
#0  lex_scan (zendlval=0x7fff1207c4a8) at Zend/zend_language_scanner.l:1805
1805                            if (*YYCURSOR == '\'') {
#0  lex_scan (zendlval=0x7fff1207c4a8) at Zend/zend_language_scanner.l:1805
#1  0x000000000071b040 in zendlex (zendlval=0x7fff1207c4a0) at /path/php-5.3.26/Zend/zend_compile.c:4976
#2  0x0000000000704abe in zendparse () at /path/php-5.3.26/Zend/zend_language_parser.c:3285
#3  0x00000000007104a8 in compile_file (file_handle=0x7fff1207c5d0, type=2) at Zend/zend_language_scanner.l:364
#4  0x000000000076a3cf in ZEND_INCLUDE_OR_EVAL_SPEC_VAR_HANDLER (execute_data=0x2650e58)
    at /path/php-5.3.26/Zend/zend_vm_execute.h:8610
#5  0x0000000000758828 in execute (op_array=0x1d187f0) at /path/php-5.3.26/Zend/zend_vm_execute.h:107
#6  0x00000000007331ca in zend_execute_scripts (type=8, retval=<value optimized out>, file_count=3)
    at /path/php-5.3.26/Zend/zend.c:1259
#7  0x00000000006e183e in php_execute_script (primary_file=<value optimized out>) at /path/php-5.3.26/main/main.c:2316
#8  0x00000000007c2218 in main (argc=<value optimized out>, argv=<value optimized out>)
    at /path/php-5.3.26/sapi/fpm/fpm/fpm_main.c:1929