Index: ext/rtree/rtree.c
==================================================================
--- ext/rtree/rtree.c
+++ ext/rtree/rtree.c
@@ -2658,11 +2658,11 @@
 /*
 ** Remove the entry with rowid=iDelete from the r-tree structure.
 */
 static int rtreeDeleteRowid(Rtree *pRtree, sqlite3_int64 iDelete){
   int rc;                         /* Return code */
-  RtreeNode *pLeaf;               /* Leaf node containing record iDelete */
+  RtreeNode *pLeaf = 0;           /* Leaf node containing record iDelete */
   int iCell;                      /* Index of iDelete cell in pLeaf */
   RtreeNode *pRoot;               /* Root node of rtree structure */
 
 
   /* Obtain a reference to the root node to initialise Rtree.iDepth */
@@ -2861,11 +2861,11 @@
   ** (azData[2]..azData[argc-1]) contain a new record to insert into
   ** the r-tree structure.
   */
   if( rc==SQLITE_OK && nData>1 ){
     /* Insert the new record into the r-tree */
-    RtreeNode *pLeaf;
+    RtreeNode *pLeaf = 0;
 
     /* Figure out the rowid of the new row. */
     if( bHaveRowid==0 ){
       rc = newRowid(pRtree, &cell.iRowid);
     }

Index: src/main.c
==================================================================
--- src/main.c
+++ src/main.c
@@ -3017,11 +3017,11 @@
     ** with various optimizations disabled to verify that the same answer
     ** is obtained in every case.
     */
     case SQLITE_TESTCTRL_OPTIMIZATIONS: {
       sqlite3 *db = va_arg(ap, sqlite3*);
-      db->dbOptFlags = (u16)(va_arg(ap, int) & 0xffff);
+      db->dbOptFlags = (u8)(va_arg(ap, int) & 0xff);
       break;
     }
 
 #ifdef SQLITE_N_KEYWORD
     /* sqlite3_test_control(SQLITE_TESTCTRL_ISKEYWORD, const char *zWord)

Index: src/pager.c
==================================================================
--- src/pager.c
+++ src/pager.c
@@ -3479,11 +3479,11 @@
 ){
   pPager->xBusyHandler = xBusyHandler;
   pPager->pBusyHandlerArg = pBusyHandlerArg;
 
   if( isOpen(pPager->fd) ){
-    void **ap = &pPager->xBusyHandler;
+    void **ap = (void **)&pPager->xBusyHandler;
     assert( ((int(*)(void *))(ap[0]))==xBusyHandler );
     assert( ap[1]==pBusyHandlerArg );
     sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_BUSYHANDLER, (void *)ap);
   }
 }