Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007faa7f97f930 in zend_string_realloc (s=0x0, len=4097, persistent=0) at /home/fedorenko/php7/php-src/Zend/zend_string.h:185
185   if (!ZSTR_IS_INTERNED(s)) {
warning: File "/home/fedorenko/php7/php-src/.gdbinit" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".
To enable execution of this file add
  add-auto-load-safe-path /home/fedorenko/php7/php-src/.gdbinit
line to your configuration file "/home/fedorenko/.gdbinit".
To completely disable this security protection add
  set auto-load safe-path /
line to your configuration file "/home/fedorenko/.gdbinit".
For more information about this security protection see the
"Auto-loading safe path" section in the GDB manual.  E.g., run from the shell:
  info "(gdb)Auto-loading safe path"
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
(gdb) bt
#0  0x00007faa7f97f930 in zend_string_realloc (s=0x0, len=4097, persistent=0) at /home/fedorenko/php7/php-src/Zend/zend_string.h:185
#1  0x00007faa7f9863f5 in get_http_body (stream=0x7faa711f90c0, close=1,
    headers=0x7faa6fde2118 "HTTP/1.1 200 OK\r\nServer: Apache-Coyote/1.1\r\nX-AREQUESTID: 923x2281982x1\r\nX-ASESSIONID: 1oflkz4\r\nContent-Type: text/xml;charset=utf-8\r\nDate: Thu, 15 Oct 2015 04:23:17 GMT\r\nConnection: close\r\n") at /home/fedorenko/php7/php-src/ext/soap/php_http.c:1497
#2  0x00007faa7f98483d in make_http_soap_request (this_ptr=0x7faa75c13300, buf=0x7faa6ec67880, location=0x7faa70eaccc8 "http://aux.srv.loc:82/rpc/soap/jirasoapservice-v2",
    soapaction=0x7faa6ea53a18 "", soap_version=1, return_value=0x7faa75c132c0) at /home/fedorenko/php7/php-src/ext/soap/php_http.c:1068
#3  0x00007faa7f96b5c5 in zim_SoapClient___doRequest (execute_data=0x7faa75c132e0, return_value=0x7faa75c132c0) at /home/fedorenko/php7/php-src/ext/soap/soap.c:3121
#4  0x00007faa7fc23ead in ZEND_DO_FCALL_SPEC_HANDLER () at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:842
#5  0x00007faa7fc22d61 in execute_ex (ex=0x7faa75c13200) at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:414
#6  0x00007faa7fbb1135 in zend_call_function (fci=0x7fff181ab0a0, fci_cache=0x7fff181aafb0) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:854
#7  0x00007faa7fbb064f in call_user_function_ex (function_table=0x0, object=0x7faa75c131a0, function_name=0x7fff181ab220, retval_ptr=0x7fff181ab4e0, param_count=5,
    params=0x7fff181ab250, no_separation=1, symbol_table=0x0) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:679
#8  0x00007faa7fbb0576 in call_user_function (function_table=0x0, object=0x7faa75c131a0, function_name=0x7fff181ab220, retval_ptr=0x7fff181ab4e0, param_count=5,
    params=0x7fff181ab250) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:661
#9  0x00007faa7f968f4e in do_request (this_ptr=0x7faa75c131a0, request=0x7faa85aba590, location=0x7faa70f1ac00 "http://aux.srv.loc:82/rpc/soap/jirasoapservice-v2",
    action=0x7faa6fe73c08 "", version=1, one_way=0, response=0x7fff181ab4e0) at /home/fedorenko/php7/php-src/ext/soap/soap.c:2586
#10 0x00007faa7f969ad1 in do_soap_call (execute_data=0x7faa75c13180, this_ptr=0x7faa75c131a0, function=0x7faa71ec1b30 "getIssue", function_len=8, arg_count=2,
    real_args=0x7faa6ea5db80, return_value=0x7faa75c13160, location=0x7faa70f1ac00 "http://aux.srv.loc:82/rpc/soap/jirasoapservice-v2", soap_action=0x0, call_uri=0x0,
    soap_headers=0x0, output_headers=0x0) at /home/fedorenko/php7/php-src/ext/soap/soap.c:2733
#11 0x00007faa7f96ac0b in zim_SoapClient___call (execute_data=0x7faa75c13180, return_value=0x7faa75c13160) at /home/fedorenko/php7/php-src/ext/soap/soap.c:2951
#12 0x00007faa7fc23ead in ZEND_DO_FCALL_SPEC_HANDLER () at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:842
#13 0x00007faa7fc22d61 in execute_ex (ex=0x7faa75c12030) at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:414
#14 0x00007faa7fc22e73 in zend_execute (op_array=0x7faa75c63000, return_value=0x0) at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:458
#15 0x00007faa7fbc86ae in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/fedorenko/php7/php-src/Zend/zend.c:1428
#16 0x00007faa7fb35f8f in php_execute_script (primary_file=0x7fff181adc30) at /home/fedorenko/php7/php-src/main/main.c:2471
#17 0x00007faa7fc86a7f in php_handler (r=0x7faa7576d3b0) at /home/fedorenko/php7/php-src/sapi/apache2handler/sapi_apache2.c:678
#18 0x00007faa84287fd0 in ap_run_handler (r=0x7faa7576d3b0) at config.c:169
#19 0x00007faa84288519 in ap_invoke_handler (r=r@entry=0x7faa7576d3b0) at config.c:433
#20 0x00007faa8429db1c in ap_internal_redirect (new_uri=<optimized out>, r=<optimized out>) at http_request.c:658
#21 0x00007faa76e8fd0c in handler_redirect (r=0x7faa7574e0a0) at mod_rewrite.c:5131
#22 0x00007faa84287fd0 in ap_run_handler (r=0x7faa7574e0a0) at config.c:169
#23 0x00007faa84288519 in ap_invoke_handler (r=r@entry=0x7faa7574e0a0) at config.c:433
#24 0x00007faa8429e7ba in ap_process_async_request (r=0x7faa7574e0a0) at http_request.c:338
#25 0x00007faa8429ea94 in ap_process_request (r=r@entry=0x7faa7574e0a0) at http_request.c:373
#26 0x00007faa8429adee in ap_process_http_sync_connection (c=0x7faa84032290) at http_core.c:210
#27 ap_process_http_connection (c=0x7faa84032290) at http_core.c:251
#28 0x00007faa84291b10 in ap_run_process_connection (c=0x7faa84032290) at connection.c:41
#29 0x00007faa84291f28 in ap_process_connection (c=c@entry=0x7faa84032290, csd=<optimized out>) at connection.c:213
#30 0x00007faa806bb767 in child_main (child_num_arg=child_num_arg@entry=1) at prefork.c:704
#31 0x00007faa806bb9a6 in make_child (s=0x7faa841f6f30, slot=1) at prefork.c:800
#32 0x00007faa806bc60e in perform_idle_server_maintenance (p=<optimized out>) at prefork.c:902
#33 prefork_run (_pconf=<optimized out>, plog=<optimized out>, s=<optimized out>) at prefork.c:1090

Looks like you have the same problem as bug #70709, which just got a fix a few hours ago. Can you use a fresh checkout of master, or try the patch posted in that other bug report?

Got fresh master, check patch from 70709. Same issue in same place:

(gdb) bt
#0  0x00007fb5f6294930 in zend_string_realloc (s=0x0, len=4097, persistent=0) at /home/fedorenko/php7/php-src/Zend/zend_string.h:185
#1  0x00007fb5f629b3f5 in get_http_body (stream=0x7fb5e6803f80, close=1,
    headers=0x7fb5e63f6118 "HTTP/1.1 200 OK\r\nServer: Apache-Coyote/1.1\r\nX-AREQUESTID: 1019x2299132x1\r\nX-ASESSIONID: l3417j\r\nContent-Type: text/xml;charset=utf-8\r\nDate: Thu, 15 Oct 2015 05:59:42 GMT\r\nConnection: close\r\n") at /home/fedorenko/php7/php-src/ext/soap/php_http.c:1497
#2  0x00007fb5f629983d in make_http_soap_request (this_ptr=0x7fb5ec414300, buf=0x7fb5e6479600, location=0x7fb5e63b70f8 "http://aux.srv.loc:82/rpc/soap/jirasoapservice-v2",
    soapaction=0x7fb5e60073d8 "", soap_version=1, return_value=0x7fb5ec4142c0) at /home/fedorenko/php7/php-src/ext/soap/php_http.c:1068
#3  0x00007fb5f62805c5 in zim_SoapClient___doRequest (execute_data=0x7fb5ec4142e0, return_value=0x7fb5ec4142c0) at /home/fedorenko/php7/php-src/ext/soap/soap.c:3121
#4  0x00007fb5f6538ead in ZEND_DO_FCALL_SPEC_HANDLER () at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:842
#5  0x00007fb5f6537d61 in execute_ex (ex=0x7fb5ec414200) at /home/fedorenko/php7/php-src/Zend/zend_vm_execute.h:414
#6  0x00007fb5f64c6135 in zend_call_function (fci=0x7fff179379f0, fci_cache=0x7fff17937900) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:854
#7  0x00007fb5f64c564f in call_user_function_ex (function_table=0x0, object=0x7fb5ec4141a0, function_name=0x7fff17937b70, retval_ptr=0x7fff17937e30, param_count=5,
    params=0x7fff17937ba0, no_separation=1, symbol_table=0x0) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:679
#8  0x00007fb5f64c5576 in call_user_function (function_table=0x0, object=0x7fb5ec4141a0, function_name=0x7fff17937b70, retval_ptr=0x7fff17937e30, param_count=5,
    params=0x7fff17937ba0) at /home/fedorenko/php7/php-src/Zend/zend_execute_API.c:661

hmm, same reason on different places.. will make a fix.

committed, there should no other similar bugs... thanks

Thank you. Confirm, bug fixed.