[td-5600]<fix>: fix fill caused crashed in join query.

src/client/src/tscUtil.c

@@ -3190,6 +3190,7 @@ static void freeQueryInfoImpl(SQueryInfo* pQueryInfo) {
   }
   
   pQueryInfo->tsBuf = tsBufDestroy(pQueryInfo->tsBuf);
+  pQueryInfo->fillType = 0;
 
   tfree(pQueryInfo->fillVal);
   tfree(pQueryInfo->buf);

src/os/src/detail/osTimer.c

@@ -38,7 +38,7 @@ static void *taosProcessAlarmSignal(void *tharg) {
 
   struct sigevent sevent = {{0}};
 
-  setThreadName("alarmSignal");
+  setThreadName("tmr");
 
   #ifdef _ALPINE
     sevent.sigev_notify = SIGEV_THREAD;

tests/script/general/parser/join.sim

@@ -444,6 +444,10 @@ if $rows != $val then
   return -1
 endi
 
+print ================>TD-5600
+sql select first(join_tb0.c8),first(join_tb0.c9) from join_tb1 , join_tb0 where join_tb1.ts = join_tb0.ts and join_tb1.ts <= 100002 and join_tb1.ts>=100000 interval(1s) fill(linear);
+
+
 #===============================================================
 sql select first(join_tb0.c8),first(join_tb0.c9) from join_tb1 , join_tb0 where join_tb1.ts = join_tb0.ts and join_tb1.ts <= 100002 and join_tb0.c7 = true