prediction.c: In function 'zbx_timeleft':
prediction.c:833:11: warning: 'result' may be used uninitialized in this function [-Wmaybe-uninitialized]
   *result -= now;
           ^~
prediction.c:1148:19: note: 'result' was declared here
  double  current, result;
                   ^~~~~~

dbupgrade_3010.c: In function 'DBpatch_3010026_expression_remove_values_impl':
dbupgrade_3010.c:980:66: warning: 'value_token.r' may be used uninitialized in this function [-Wmaybe-uninitialized]
     DBpatch_3010026_expression_move_location(&token, -(cut_loc.r - cut_loc.l + 1));
                                                        ~~~~~~~~~~^~~~~~~~~~~
dbupgrade_3010.c:993:66: warning: 'value_token.l' may be used uninitialized in this function [-Wmaybe-uninitialized]
     DBpatch_3010026_expression_move_location(&token, -(cut_loc.r - cut_loc.l + 1));
                                                        ~~~~~~~~~~^~~~~~~~~~~
dbupgrade_3010.c:980:66: warning: 'op_token.l' may be used uninitialized in this function [-Wmaybe-uninitialized]
     DBpatch_3010026_expression_move_location(&token, -(cut_loc.r - cut_loc.l + 1));
                                                        ~~~~~~~~~~^~~~~~~~~~~

evalfunc.c: In function 'evaluate_COUNT':
evalfunc.c:415:26: warning: 'arg2_dbl' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if (!(value > pattern - ZBX_DOUBLE_EPSILON && value < pattern + ZBX_DOUBLE_EPSILON))
                           
evalfunc.c:498:12: note: 'arg2_dbl' was declared here
  double    arg2_dbl;
            ^~~~~~~~

active.c: In function 'active_checks_thread':
active.c:1245:24: warning: 'lastlogsize_orig' may be used uninitialized in this function [-Wmaybe-uninitialized]
    metric->lastlogsize = lastlogsize_orig;
    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
active.c:1043:16: note: 'lastlogsize_orig' was declared here
  zbx_uint64_t  lastlogsize_orig;
                ^~~~~~~~~~~~~~~~
active.c:1247:20: warning: 'big_rec_orig' may be used uninitialized in this function [-Wmaybe-uninitialized]
    metric->big_rec = big_rec_orig;
    ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
active.c:1042:17: note: 'big_rec_orig' was declared here
     mtime_orig, big_rec_orig, logfiles_num_new = 0, jumped = 0;
                 ^~~~~~~~~~~~
active.c:1246:18: warning: 'mtime_orig' may be used uninitialized in this function [-Wmaybe-uninitialized]
    metric->mtime =  mtime_orig;
    ~~~~~~~~~~~~~~^~~~~~~~~~~~~
active.c:1042:5: note: 'mtime_orig' was declared here
     mtime_orig, big_rec_orig, logfiles_num_new = 0, jumped = 0;
     ^~~~~~~~~~
active.c:1203:16: warning: 's_count_orig' may be used uninitialized in this function [-Wmaybe-uninitialized]
    match_count = s_count_orig - s_count;
    ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
active.c:1041:44: note: 's_count_orig' was declared here
  int   rate, ret = FAIL, s_count, p_count, s_count_orig, is_count_item, max_delay_par_nr,
                                            ^~~~~~~~~~~~

lld_trigger.c: In function 'lld_triggers_save.isra.18':
lld_trigger.c:2595:5: warning: 'triggertagid' may be used uninitialized in this function [-Wmaybe-uninitialized]
     zbx_db_insert_add_values(&db_insert_ttags, tag->triggertagid, trigger->triggerid,
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       tag->tag, tag->value);
       ~~~~~~~~~~~~~~~~~~~~~