Index: ext/fts5/fts5_hash.c
==================================================================
--- ext/fts5/fts5_hash.c
+++ ext/fts5/fts5_hash.c
@@ -169,14 +169,15 @@
   if( !apNew ) return SQLITE_NOMEM;
   memset(apNew, 0, nNew*sizeof(Fts5HashEntry*));
 
   for(i=0; i<pHash->nSlot; i++){
     while( apOld[i] ){
-      int iHash;
+      unsigned int iHash;
       Fts5HashEntry *p = apOld[i];
       apOld[i] = p->pHashNext;
-      iHash = fts5HashKey(nNew, (u8*)fts5EntryKey(p), strlen(fts5EntryKey(p)));
+      iHash = fts5HashKey(nNew, (u8*)fts5EntryKey(p),
+                          (int)strlen(fts5EntryKey(p)));
       p->pHashNext = apNew[iHash];
       apNew[iHash] = p;
     }
   }
 
@@ -475,11 +476,11 @@
   const char *pTerm, int nTerm,   /* Query term */
   const u8 **ppDoclist,           /* OUT: Pointer to doclist for pTerm */
   int *pnDoclist                  /* OUT: Size of doclist in bytes */
 ){
   unsigned int iHash = fts5HashKey(pHash->nSlot, (const u8*)pTerm, nTerm);
-  char *zKey;
+  char *zKey = 0;
   Fts5HashEntry *p;
 
   for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){
     zKey = fts5EntryKey(p);
     if( memcmp(zKey, pTerm, nTerm)==0 && zKey[nTerm]==0 ) break;

Index: ext/fts5/fts5_test_tok.c
==================================================================
--- ext/fts5/fts5_test_tok.c
+++ ext/fts5/fts5_test_tok.c
@@ -180,11 +180,11 @@
 ){
   fts5_api *pApi = (fts5_api*)pCtx;
   Fts5tokTable *pTab = 0;
   int rc;
   char **azDequote = 0;
-  int nDequote;
+  int nDequote = 0;
 
   rc = sqlite3_declare_vtab(db, 
        "CREATE TABLE x(input HIDDEN, token, start, end, position)"
   );
 

Index: ext/fts5/test/fts5rank.test
==================================================================
--- ext/fts5/test/fts5rank.test
+++ ext/fts5/test/fts5rank.test
@@ -88,10 +88,11 @@
 
 do_test 2.7 {
   execsql { SELECT rowid FROM tt('a') ORDER BY rank; } db
 } {1 3 2}
 
+db2 close
 
 #--------------------------------------------------------------------------
 # At one point there was a problem with queries such as:
 #
 #   ... MATCH 'x OR y' ORDER BY rank;