diff --git a/unittest/mysys/stacktrace-t.c b/unittest/mysys/stacktrace-t.c

index 8fa0db15b36..67eb099028e 100644

--- a/unittest/mysys/stacktrace-t.c

+++ b/unittest/mysys/stacktrace-t.c

@@ -22,6 +22,14 @@

 char b_bss[10];

+#ifndef HAVE_STACKTRACE

+int  my_safe_print_str(const char* val, size_t max_len)

+{

+  printf("%*s\n", (int) max_len, val);

+  return 0;

+}

+#endif

+

 void test_my_safe_print_str()

 {

   char b_stack[10];

$ ./unittest/mysys/stacktrace-t

===== heap =====

LEGALa�

===== BSS =====

LEGALx�b���`U��XN/home/dan�����宱��ࣟ�`U

===== data =====

LEGAL

===== stack =====

===== heap =====

===== BSS =====

===== data =====

===== NULL =====

===== (const char*) 1 =====

test_my_safe_print_str

===== Above is a junk, but it is expected. =====

===== Nornal length test =====

# Bail out! Signal %d thrown

MYTAP_CONFIG1..%d

1..0 # skip todo # %s %s%sok %d%snot  - skip days  day  hours  hour Failed %d tests!%ld %s%ld min %.2f secTest took %s

%d tests planned,  %d failed,  %d was last executed%d tests planned but%s %d executed�@�C �@N@UMASKUMASK_DIRunknownHOMEWaiting for table level lock

User time %.2f, System time %.2f

Maximum resident set size %ld, Integral resident set size %ld

Non-physical pagefaults %ld, Physical pagefaults %ld, Swaps %ld

Blocks in %ld out %ld, Messages in %ld out %ld, Signals %ld

Voluntary context switches %ld, Involuntary context switches %ld

Y@TCPSOCKETPIPEMEMORY01230120022455012623010202Error in my_thread_global_end(): %d threads didn't exit

Can't initialize threads: error %d

NPTLlinuxthreadsno_namestack_bottom = %p thread_stack 0x%lx

(my_addr_resolve failure: %s)

%s:%u(%s)[%p]

%s(%s+%s

(null)Can't access address %pError while parsing '%s': %s

ucs2utf8utf8mb3utf8mb4utf16utf32/usr/local/mysql/sharecharsets//usr/local/mysqlutf8mb3_utf8_%s.xml[import ?646latin1ANSI_X3.4-1968ansi1251cp1251armscii8armscii-8Big5big5cp1255hebrewCP866cp866eucCNgb2312euc-CNeucJPujiseuc-JPeucKReuckreuc-KRgbkgeorgianpsgeostd8georgian-psIBM-1252cp1252iso88591ISO_8859-1ISO8859-1ISO-8859-1iso885913latin7ISO_8859-13ISO8859-13ISO-8859-13iso88592latin2ISO_8859-2ISO8859-2ISO-8859-2iso88597greekISO_8859-7ISO8859-7ISO-8859-7iso88598ISO_8859-8ISO8859-8ISO-8859-8iso88599latin5ISO_8859-9ISO8859-9ISO-8859-9koi8rKOI8-Rkoi8uKOI8-Uroman8hp8Shift_JISsjisSJISshiftjisx0213tis620tis-620US-ASCIIutf-���:���:���:���:���:���:���:���:���:�������:���:������:���:���:���:���:���:���:���:���:���:���:���:���@���:���:���:���:���:���:���:�������:���:���:���:�������Retry in %d secs. Message reprinted in %d secsCan't create/write to file '%s' (Errcode: %M)Error reading file '%s' (Errcode: %M)Error writing file '%s' (Errcode: %M)Error on close of '%s' (Errcode: %M)Out of memory (Needed %u bytes)Error on delete of '%s' (Errcode: %M)Error on rename of '%s' to '%s' (Errcode: %M)Unexpected end-of-file found when reading file '%s' (Errcode: %M)Can't unlock file (Errcode: %M)Can't read dir of '%s' (Errcode: %M)Can't get stat of '%s' (Errcode: %M)Can't change size of file (Errcode: %M)Can't open stream from handle (Errcode: %M)Can't get working directory (Errcode: %M)Can't change dir to '%s' (Errcode: %M)Warning: %d files and %d streams is left open

....

(many many lines of junk)

....

Q�R�R�R�RHVBVLV5VAVJVIVFVXVZV@V3V=V,V>V8V*V:V�W�X�X�X�X�X�X�X�X�X�X�Z�Z�Z�Z�Z[�Z[�Z[[[[g\�]�]�]�]�]�]�]�]�]�]�]�]i^]^`^\^�}�^�^�^I_�_�a�aya�a�a�a�a�a�a�a�a�a�a�a�a�afa�a-bndpd�d�d�d�d�dj�i�id�djjj%jj�i&jj�ijQk�k�k�k�kll�klAo&o~o�o�o�o�o�o�oboOo�oZo�ovolo�oUoroRoPoWo�o�o]ooaoko}ogo�oSo�oioo�ocowojo{o�q�q�q�q�q�q�q�q�q�q�q�q�q�q�q�q�q�r�rXsRs^s_s`s]s[sasZsYsbs�t�t�t�t�t}t�t�t|tyuu~u%vv

===== Above is a junk, but it is expected. =====

===== Nornal length test =====

LEGAL

===== NULL =====

(null)

===== (const char*) 1 =====

Can't access address 0x1

ok 1 - test_my_safe_print_str

Test took 0.16 sec

$ echo $?

0

$ ./unittest/mysys/stacktrace-t  2> /dev/null; echo $?

1..1

ok 1 - test_my_safe_print_str

Test took 0.06 sec

0

humpty$ ./unittest/mysys/stacktrace-t  2> /dev/null; echo $?

1..1

ok 1 - test_my_safe_print_str

Test took 0.25 sec

0

/home/ports/pobj/mariadb-10.5.8/mariadb-10.5.8/mysys/my_lock.c:183:7: warning: incompatible function pointer types assigning to 'sig_return' (aka 'void (*)(void)') from 'void (*)(int)' [-Wincompatible-function-pointer-types]

      ALARM_INIT;

      ^~~~~~~~~~

/home/ports/pobj/mariadb-10.5.8/mariadb-10.5.8/include/my_alarm.h:43:16: note: expanded from macro 'ALARM_INIT'

                        alarm_signal=signal(SIGALRM,my_set_alarm_variable);

                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/home/ports/pobj/mariadb-10.5.8/mariadb-10.5.8/mysys/my_lock.c:189:7: warning: incompatible function pointer types passing 'sig_return' (aka 'void (*)(void)') to parameter of type 'void (*)(int)' [-Wincompatible-function-pointer-types]

      ALARM_END;

      ^~~~~~~~~

/home/ports/pobj/mariadb-10.5.8/mariadb-10.5.8/include/my_alarm.h:44:41: note: expanded from macro 'ALARM_END'

#define ALARM_END       (void) signal(SIGALRM,alarm_signal); \

                                              ^~~~~~~~~~~~

/usr/include/sys/signal.h:199:27: note: passing argument to parameter here

void    (*signal(int, void (*)(int)))(int);

                             ^

2 warnings generated.