diff --git a/src/cc/crypto777/OS_portable.h b/src/cc/crypto777/OS_portable.h
index d6abc98c5..aeb45bc32 100755
--- a/src/cc/crypto777/OS_portable.h
+++ b/src/cc/crypto777/OS_portable.h
@@ -309,8 +309,8 @@ char *uppercase_str(char *buf,char *str);
 char *lowercase_str(char *buf,char *str);
 int32_t strsearch(char *strs[],int32_t num,char *name);
 int32_t OS_getline(int32_t waitflag,char *line,int32_t max,char *dispstr);
-int32_t sort64s(uint64_t *buf,uint32_t num,int32_t size);
-int32_t revsort64s(uint64_t *buf,uint32_t num,int32_t size);
+void sort64s(uint64_t *buf,uint32_t num,int32_t size);
+void revsort64s(uint64_t *buf,uint32_t num,int32_t size);
 int decode_base32(uint8_t *token,uint8_t *tokenstr,int32_t len);
 int init_base32(char *tokenstr,uint8_t *token,int32_t len);
 char *OS_mvstr();
diff --git a/src/komodo.h b/src/komodo.h
index cd7c6573a..4de6ee4f3 100644
--- a/src/komodo.h
+++ b/src/komodo.h
@@ -803,7 +803,10 @@ int32_t komodo_notarycmp(uint8_t *scriptPubKey,int32_t scriptlen,uint8_t pubkeys
     return(-1);
 }
 
-// int32_t ! 
+// int32_t (!!!)
+/*
+    read blackjok3rtt comments in main.cpp 
+*/
 int32_t komodo_connectblock(bool fJustCheck, CBlockIndex *pindex,CBlock& block)
 {
     static int32_t hwmheight;
@@ -897,8 +900,8 @@ int32_t komodo_connectblock(bool fJustCheck, CBlockIndex *pindex,CBlock& block)
             }
             numvalid = bitweight(signedmask);
             if ( ((height < 90000 || (signedmask & 1) != 0) && numvalid >= KOMODO_MINRATIFY) ||
-                  (numvalid >= KOMODO_MINRATIFY && ASSETCHAINS_SYMBOL[0] != 0) ||
-                  numvalid > (numnotaries/5) )
+                (numvalid >= KOMODO_MINRATIFY && ASSETCHAINS_SYMBOL[0] != 0) ||
+                numvalid > (numnotaries/5) )
             {
                 if ( !fJustCheck && ASSETCHAINS_SYMBOL[0] != 0)
                 {
@@ -918,7 +921,7 @@ int32_t komodo_connectblock(bool fJustCheck, CBlockIndex *pindex,CBlock& block)
                         fflush(signedfp);
                     }
                     transaction = i;
-                     printf("[%s] ht.%d txi.%d signedmask.%llx numvins.%d numvouts.%d <<<<<<<<<<<  notarized\n",ASSETCHAINS_SYMBOL,height,i,(long long)signedmask,numvins,numvouts);
+                    printf("[%s] ht.%d txi.%d signedmask.%llx numvins.%d numvouts.%d <<<<<<<<<<<  notarized\n",ASSETCHAINS_SYMBOL,height,i,(long long)signedmask,numvins,numvouts);
                 }
                 notarized = 1;
             }
@@ -1014,7 +1017,9 @@ int32_t komodo_connectblock(bool fJustCheck, CBlockIndex *pindex,CBlock& block)
             printf("%s ht.%d\n",ASSETCHAINS_SYMBOL[0] == 0 ? "KMD" : ASSETCHAINS_SYMBOL,height);
         if ( !fJustCheck && pindex->GetHeight() == hwmheight )
             komodo_stateupdate(height,0,0,0,zero,0,0,0,0,height,(uint32_t)pindex->nTime,0,0,0,0,zero,0);
-    } else fprintf(stderr,"komodo_connectblock: unexpected null pindex\n");
+    } 
+    else 
+        { fprintf(stderr,"komodo_connectblock: unexpected null pindex\n"); return(0); }
     //KOMODO_INITDONE = (uint32_t)time(NULL);
     //fprintf(stderr,"%s end connect.%d\n",ASSETCHAINS_SYMBOL,pindex->GetHeight());
     if (fJustCheck)
@@ -1025,6 +1030,12 @@ int32_t komodo_connectblock(bool fJustCheck, CBlockIndex *pindex,CBlock& block)
             return(1);
         if ( notarisations.size() > 1 || (notarisations.size() == 1 && notarisations[0] != 1) )
             return(-1);
+        
+        fprintf(stderr,"komodo_connectblock: unxexpected behaviour when fJustCheck == true, report blackjok3rtt plz ! \n");
+        /* this needed by gcc-8, it counts here that control reaches end of non-void function without this.
+           by default, we count that if control reached here -> the valid notarization isnt in position 1 or there are too many notarizations in this block.
+        */
+        return(-1); 
     }
     else return(0);
 }
diff --git a/src/komodo_gateway.h b/src/komodo_gateway.h
index 1455c34b3..7cfe870b4 100644
--- a/src/komodo_gateway.h
+++ b/src/komodo_gateway.h
@@ -2597,7 +2597,7 @@ static int cmp_llu(const void *a, const void*b)
     else return(1);
 }
 
-static int64_t sort64(int64_t *l, int32_t llen)
+static void sort64(int64_t *l, int32_t llen)
 {
     qsort(l,llen,sizeof(uint64_t),cmp_llu);
 }
@@ -2611,7 +2611,7 @@ static int revcmp_llu(const void *a, const void*b)
     else return(1);
 }
 
-static int64_t revsort64(int64_t *l, int32_t llen)
+static void revsort64(int64_t *l, int32_t llen)
 {
     qsort(l,llen,sizeof(uint64_t),revcmp_llu);
 }
diff --git a/src/main.cpp b/src/main.cpp
index c14e4351d..a8ae8b60c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3392,7 +3392,7 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
     {
         // do a full block scan to get notarisation position and to enforce a valid notarization is in position 1.
         // if notarisation in the block, must be position 1 and the coinbase must pay notaries.
-        int notarisationTx = komodo_connectblock(true,pindex,*(CBlock *)&block);  
+        int32_t notarisationTx = komodo_connectblock(true,pindex,*(CBlock *)&block);  
         // -1 means that the valid notarization isnt in position 1 or there are too many notarizations in this block.
         if ( notarisationTx == -1 )
             return state.DoS(100, error("ConnectBlock(): Notarization is not in TX position 1 or block contains more than 1 notarization! Invalid Block!"),