SIGSEGV in suhosin_zend_stream_open

[the0ne]

PHP-Script that's being debugged is a customer's Joomla 3.9.0
Crash seems to happen when Joomla tries to read an .ini-file for it's localization.

$ php7.0 -v
PHP 7.0.32-0ubuntu0.16.04.1 (cli) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.0.32-0ubuntu0.16.04.1, Copyright (c) 1999-2017, by Zend Technologies

$ gdb -q php7.0
Reading symbols from php7.0...(no debugging symbols found)...done.
(gdb) run index.php
Starting program: /usr/bin/php7.0 index.php
[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.
0x00007fffe258ee07 in suhosin_zend_stream_open (
filename=0x7fffdf8203d8 "/path/to/www/language/de-DE/de-DE.ini", handle=0x7fffffffa3b0) at /usr/local/src/suhosin7/execute.c:302
302 if ((execute_data != NULL) && (execute_data->opline != NULL) && (execute_data->opline->opcode == ZEND_INCLUDE_OR_EVAL)) {
(gdb) bt

0. 0x00007fffe258ee07 in suhosin_zend_stream_open (
   filename=0x7fffdf8203d8 "/path/to/www/language/de-DE/de-DE.ini", handle=0x7fffffffa3b0) at /usr/local/src/suhosin7/execute.c:302
1. 0x00005555557cc944 in zend_stream_fixup ()
2. 0x0000555555782e6a in zend_ini_open_file_for_scanning ()
3. 0x0000555555782bec in zend_parse_ini_file ()
4. 0x00005555556ed789 in zif_parse_ini_file ()
5. 0x0000555555834f30 in ?? ()
6. 0x00005555557effcb in execute_ex ()
7. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3814a90)
   at /usr/local/src/suhosin7/execute.c:532
8. 0x000055555583506d in ?? ()
9. 0x00005555557effcb in execute_ex ()
10. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff38149a0)
    at /usr/local/src/suhosin7/execute.c:532
11. 0x000055555583506d in ?? ()
12. 0x00005555557effcb in execute_ex ()
13. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff38147e0)
    at /usr/local/src/suhosin7/execute.c:532
14. 0x000055555583506d in ?? ()
15. 0x00005555557effcb in execute_ex ()
16. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff38143a0)
    at /usr/local/src/suhosin7/execute.c:532
17. 0x000055555583506d in ?? ()
18. 0x00005555557effcb in execute_ex ()
19. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3813e30)
    at /usr/local/src/suhosin7/execute.c:532
20. 0x000055555583506d in ?? ()
21. 0x00005555557effcb in execute_ex ()
22. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3813cc0)
    at /usr/local/src/suhosin7/execute.c:532
23. 0x000055555583506d in ?? ()
24. 0x00005555557effcb in execute_ex ()
25. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3813a50)
    at /usr/local/src/suhosin7/execute.c:532
26. 0x000055555583506d in ?? ()
27. 0x00005555557effcb in execute_ex ()
28. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3813540)
    at /usr/local/src/suhosin7/execute.c:532
29. 0x000055555583506d in ?? ()
30. 0x00005555557effcb in execute_ex ()
31. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff38133e0)
    at /usr/local/src/suhosin7/execute.c:532
32. 0x000055555583506d in ?? ()
33. 0x00005555557effcb in execute_ex ()
34. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff38132a0)
    at /usr/local/src/suhosin7/execute.c:532
35. 0x000055555583506d in ?? ()
36. 0x00005555557effcb in execute_ex ()
37. 0x00007fffe258ef17 in suhosin_execute_ex (execute_data=0x7ffff3813030)
    at /usr/local/src/suhosin7/execute.c:532
38. 0x00005555558445f7 in zend_execute ()
39. 0x00005555557af5b3 in zend_execute_scripts ()
40. 0x000055555574e4b0 in php_execute_script ()
41. 0x00005555558462b7 in ?? ()
42. 0x00005555556309d4 in main ()

(gdb)

[the0ne]

sorry for unintentionally "referencing" various other issues by pasting the raw gdb output.