diff --git a/ext/fts3/fts3_snippet.c b/ext/fts3/fts3_snippet.c
index da8955646a..d214e45f64 100644
--- a/ext/fts3/fts3_snippet.c
+++ b/ext/fts3/fts3_snippet.c
@@ -1000,8 +1000,8 @@ static int fts3MatchinfoCheck(
   return SQLITE_ERROR;
 }
 
-static int fts3MatchinfoSize(MatchInfo *pInfo, char cArg){
-  int nVal;                       /* Number of integers output by cArg */
+static size_t fts3MatchinfoSize(MatchInfo *pInfo, char cArg){
+  size_t nVal;                      /* Number of integers output by cArg */
 
   switch( cArg ){
     case FTS3_MATCHINFO_NDOC:
@@ -1285,7 +1285,7 @@ static int fts3MatchinfoValues(
 
       case FTS3_MATCHINFO_LHITS_BM:
       case FTS3_MATCHINFO_LHITS: {
-        int nZero = fts3MatchinfoSize(pInfo, zArg[i]) * sizeof(u32);
+        size_t nZero = fts3MatchinfoSize(pInfo, zArg[i]) * sizeof(u32);
         memset(pInfo->aMatchinfo, 0, nZero);
         rc = fts3ExprLHitGather(pCsr->pExpr, pInfo);
         break;
diff --git a/ext/fts5/fts5_index.c b/ext/fts5/fts5_index.c
index 08d63576bc..2bdeab1868 100644
--- a/ext/fts5/fts5_index.c
+++ b/ext/fts5/fts5_index.c
@@ -3691,7 +3691,7 @@ static int fts5WriteDlidxGrow(
     if( aDlidx==0 ){
       p->rc = SQLITE_NOMEM;
     }else{
-      int nByte = sizeof(Fts5DlidxWriter) * (nLvl - pWriter->nDlidx);
+      size_t nByte = sizeof(Fts5DlidxWriter) * (nLvl - pWriter->nDlidx);
       memset(&aDlidx[pWriter->nDlidx], 0, nByte);
       pWriter->aDlidx = aDlidx;
       pWriter->nDlidx = nLvl;
diff --git a/ext/fts5/fts5_main.c b/ext/fts5/fts5_main.c
index f4ab76b167..06b8183778 100644
--- a/ext/fts5/fts5_main.c
+++ b/ext/fts5/fts5_main.c
@@ -2468,14 +2468,14 @@ static int fts5CreateAux(
   int rc = sqlite3_overload_function(pGlobal->db, zName, -1);
   if( rc==SQLITE_OK ){
     Fts5Auxiliary *pAux;
-    int nName;                      /* Size of zName in bytes, including \0 */
-    int nByte;                      /* Bytes of space to allocate */
+    sqlite3_int64 nName;            /* Size of zName in bytes, including \0 */
+    sqlite3_int64 nByte;            /* Bytes of space to allocate */
 
-    nName = (int)strlen(zName) + 1;
+    nName = strlen(zName) + 1;
     nByte = sizeof(Fts5Auxiliary) + nName;
-    pAux = (Fts5Auxiliary*)sqlite3_malloc(nByte);
+    pAux = (Fts5Auxiliary*)sqlite3_malloc64(nByte);
     if( pAux ){
-      memset(pAux, 0, nByte);
+      memset(pAux, 0, (size_t)nByte);
       pAux->zFunc = (char*)&pAux[1];
       memcpy(pAux->zFunc, zName, nName);
       pAux->pGlobal = pGlobal;
@@ -2505,15 +2505,15 @@ static int fts5CreateTokenizer(
 ){
   Fts5Global *pGlobal = (Fts5Global*)pApi;
   Fts5TokenizerModule *pNew;
-  int nName;                      /* Size of zName and its \0 terminator */
-  int nByte;                      /* Bytes of space to allocate */
+  sqlite3_int64 nName;            /* Size of zName and its \0 terminator */
+  sqlite3_int64 nByte;            /* Bytes of space to allocate */
   int rc = SQLITE_OK;
 
-  nName = (int)strlen(zName) + 1;
+  nName = strlen(zName) + 1;
   nByte = sizeof(Fts5TokenizerModule) + nName;
-  pNew = (Fts5TokenizerModule*)sqlite3_malloc(nByte);
+  pNew = (Fts5TokenizerModule*)sqlite3_malloc64(nByte);
   if( pNew ){
-    memset(pNew, 0, nByte);
+    memset(pNew, 0, (size_t)nByte);
     pNew->zName = (char*)&pNew[1];
     memcpy(pNew->zName, zName, nName);
     pNew->pUserData = pUserData;
diff --git a/ext/rbu/sqlite3rbu.c b/ext/rbu/sqlite3rbu.c
index 198ed8ab27..0160b83188 100644
--- a/ext/rbu/sqlite3rbu.c
+++ b/ext/rbu/sqlite3rbu.c
@@ -1040,7 +1040,7 @@ static int rbuMPrintfExec(sqlite3rbu *p, sqlite3 *db, const char *zFmt, ...){
 ** immediately without attempting the allocation or modifying the stored
 ** error code.
 */
-static void *rbuMalloc(sqlite3rbu *p, int nByte){
+static void *rbuMalloc(sqlite3rbu *p, sqlite3_int64 nByte){
   void *pRet = 0;
   if( p->rc==SQLITE_OK ){
     assert( nByte>0 );
@@ -1061,7 +1061,7 @@ static void *rbuMalloc(sqlite3rbu *p, int nByte){
 ** error code in the RBU handle passed as the first argument.
 */
 static void rbuAllocateIterArrays(sqlite3rbu *p, RbuObjIter *pIter, int nCol){
-  int nByte = (2*sizeof(char*) + sizeof(int) + 3*sizeof(u8)) * nCol;
+  sqlite3_int64 nByte = (2*sizeof(char*) + sizeof(int) + 3*sizeof(u8)) * nCol;
   char **azNew;
 
   azNew = (char**)rbuMalloc(p, nByte);
@@ -1705,7 +1705,7 @@ static char *rbuObjIterGetSetlist(
 */
 static char *rbuObjIterGetBindlist(sqlite3rbu *p, int nBind){
   char *zRet = 0;
-  int nByte = nBind*2 + 1;
+  sqlite3_int64 nByte = 2*(sqlite3_int64)nBind + 1;
 
   zRet = (char*)rbuMalloc(p, nByte);
   if( zRet ){
@@ -4561,7 +4561,7 @@ static int rbuVfsShmMap(
   assert( p->openFlags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_TEMP_DB) );
   if( eStage==RBU_STAGE_OAL || eStage==RBU_STAGE_MOVE ){
     if( iRegion<=p->nShm ){
-      int nByte = (iRegion+1) * sizeof(char*);
+      sqlite3_int64 nByte = (iRegion+1) * sizeof(char*);
       char **apNew = (char**)sqlite3_realloc64(p->apShm, nByte);
       if( apNew==0 ){
         rc = SQLITE_NOMEM;
diff --git a/ext/session/sqlite3session.c b/ext/session/sqlite3session.c
index 7c49385f21..acf455a509 100644
--- a/ext/session/sqlite3session.c
+++ b/ext/session/sqlite3session.c
@@ -902,7 +902,7 @@ static int sessionGrowHash(int bPatchset, SessionTable *pTab){
   if( pTab->nChange==0 || pTab->nEntry>=(pTab->nChange/2) ){
     int i;
     SessionChange **apNew;
-    int nNew = (pTab->nChange ? pTab->nChange : 128) * 2;
+    sqlite3_int64 nNew = 2*(sqlite3_int64)(pTab->nChange ? pTab->nChange : 128);
 
     apNew = (SessionChange **)sqlite3_malloc64(sizeof(SessionChange *) * nNew);
     if( apNew==0 ){
@@ -1829,7 +1829,7 @@ int sqlite3session_attach(
 ** If successful, return zero. Otherwise, if an OOM condition is encountered,
 ** set *pRc to SQLITE_NOMEM and return non-zero.
 */
-static int sessionBufferGrow(SessionBuffer *p, int nByte, int *pRc){
+static int sessionBufferGrow(SessionBuffer *p, size_t nByte, int *pRc){
   if( *pRc==SQLITE_OK && p->nAlloc-p->nBuf<nByte ){
     u8 *aNew;
     i64 nNew = p->nAlloc ? p->nAlloc : 128;
@@ -2947,7 +2947,7 @@ static int sessionChangesetReadTblhdr(sqlite3_changeset_iter *p){
   }
 
   if( rc==SQLITE_OK ){
-    int iPK = sizeof(sqlite3_value*)*p->nCol*2;
+    size_t iPK = sizeof(sqlite3_value*)*p->nCol*2;
     memset(p->tblhdr.aBuf, 0, iPK);
     memcpy(&p->tblhdr.aBuf[iPK], &p->in.aData[p->in.iNext], nCopy);
     p->in.iNext += nCopy;
@@ -4251,7 +4251,7 @@ static int sessionRetryConstraints(
 
     rc = sessionChangesetStart(&pIter2, 0, 0, cons.nBuf, cons.aBuf, 0);
     if( rc==SQLITE_OK ){
-      int nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
+      size_t nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
       int rc2;
       pIter2->bPatchset = bPatchset;
       pIter2->zTab = (char*)zTab;
diff --git a/manifest b/manifest
index e3a83afe5a..f1aaf0122b 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Use\sthe\s64-bit\smemory\sallocator\sinterfaces\sin\sextensions,\swhenever\spossible.
-D 2019-04-13T04:38:32.376
+C Fixes\sfor\sharmless\scompiler\swarnings.
+D 2019-04-13T14:07:57.472
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -90,7 +90,7 @@ F ext/fts3/fts3_hash.c 8b6e31bfb0844c27dc6092c2620bdb1fca17ed613072db057d96952c6
 F ext/fts3/fts3_hash.h 39cf6874dc239d6b4e30479b1975fe5b22a3caaf
 F ext/fts3/fts3_icu.c 305ce7fb6036484085b5556a9c8e62acdc7763f0f4cdf5fd538212a9f3720116
 F ext/fts3/fts3_porter.c 3565faf04b626cddf85f03825e86056a4562c009
-F ext/fts3/fts3_snippet.c 7d3c7076957f3f18bcd64998a5baa3f7296cb7f909b3a96e972618a6a1d9c4a8
+F ext/fts3/fts3_snippet.c 09b38ba5bfe5667aacddcb88b047fe0f7218efeb3fc8dee0e4eb6ebd170318b9
 F ext/fts3/fts3_term.c f45a1e7c6ef464abb1231245d123dae12266b69e05cc56e14045b76591ae92d1
 F ext/fts3/fts3_test.c 5f65679c195e53701d9e21d3dc73b0c09f146ae4ad86ae802d0ddaf62b29f9cd
 F ext/fts3/fts3_tokenize_vtab.c 1de9a61acfa2a0445ed989310c31839c57f6b6086dd9d5c97177ae734a17fd8b
@@ -116,8 +116,8 @@ F ext/fts5/fts5_buffer.c 7d91caa0d862079d787660ec405d2fda6fd4f206d95b870dc7adc3b
 F ext/fts5/fts5_config.c d7523cba5e66da077233c023aecbc3e6a37978ff75a18131c5ab5b1229d5bac7
 F ext/fts5/fts5_expr.c 840c88d55e78083a5e61a35968df877712ae28791b347eced1e98e3b337d2d3c
 F ext/fts5/fts5_hash.c 1cc0095646f5f3b46721aa112fb4f9bf29ae175cb5338f89dcec66ed97acfe75
-F ext/fts5/fts5_index.c 8a3ef6f2dcf2a4c4212d0a6ad5ecc5f2d2912a5a5f6ced3a6ae0d5993ecce0f4
-F ext/fts5/fts5_main.c de317d9890e9bb61e1d295a00b53d0a0b2d0ef08789108566bf530e6a1d06887
+F ext/fts5/fts5_index.c 9146da94d0b9f62217c6ad234342fda3fbac3c254455d0b3f53957ad85262e08
+F ext/fts5/fts5_main.c abd04720e2729ba5bab2648d9d541faab18f45d481ae21fc30f125b55e979d6b
 F ext/fts5/fts5_storage.c b24f6916fcdd68989a549f25962f286bdba9d9d59c7581567a6a0eb647cd07cc
 F ext/fts5/fts5_tcl.c 39bcbae507f594aad778172fa914cad0f585bf92fd3b078c686e249282db0d95
 F ext/fts5/fts5_test_mi.c 08c11ec968148d4cb4119d96d819f8c1f329812c568bac3684f5464be177d3ee
@@ -358,7 +358,7 @@ F ext/rbu/rbutemplimit.test 7f408f49b90fa0a720d7599f3aec74a3c85e6cd78e56fdf726ce
 F ext/rbu/rbuvacuum.test 55e101e90168c2b31df6c9638fe73dc7f7cc666b6142266d1563697d79f73534
 F ext/rbu/rbuvacuum2.test b8e5b51dc8b2c0153373d024c0936be3f66f9234acbd6d0baab0869d56b14e6b
 F ext/rbu/rbuvacuum3.test 8addd82e4b83b4c93fa47428eae4fd0dbf410f8512c186f38e348feb49ba03dc
-F ext/rbu/sqlite3rbu.c 3f21eda2ee997ac2db4b351d6ed87b723056a4ce5484e06f0be6671ed602cf3e
+F ext/rbu/sqlite3rbu.c f222350c33f063cbc754001cd4e9683164c6cb06be76ae43f15b396ec6fc1993
 F ext/rbu/sqlite3rbu.h 1dc88ab7bd32d0f15890ea08d23476c4198d3da3056985403991f8c9cd389812
 F ext/rbu/test_rbu.c 03f6f177096a5f822d68d8e4069ad8907fe572c62ff2d19b141f59742821828a
 F ext/repair/README.md 92f5e8aae749a4dae14f02eea8e1bb42d4db2b6ce5e83dbcdd6b1446997e0c15
@@ -431,7 +431,7 @@ F ext/session/sessioninvert.test ae1a003a9ab1f8d64227dbb5c3a4c97e65b561b01e7b295
 F ext/session/sessionrebase.test ccfa716b23bd1d3b03217ee58cfd90c78d4b99f53e6a9a2f05e82363b9142810
 F ext/session/sessionstat1.test 218d351cf9fcd6648f125a26b607b140310160184723c2666091b54450a68fb5
 F ext/session/sessionwor.test 67b5ab91d4f93ce65ff1f58240ac5ddf73f8670facc1ffa49cef56293d52818d
-F ext/session/sqlite3session.c faf074fedbb3d17d82b1321575b5412e234746a2d5bd2244bc85484786ab686d
+F ext/session/sqlite3session.c 12c958dcd093fca229ca3d3fd833f2f99f1d9c70093dca60f697d5f8e20ebde1
 F ext/session/sqlite3session.h 919be6649d39d6413ce7a63fc3e3bca3270e18bc2d57ad4040a70007b9e54397
 F ext/session/test_session.c 98797aba475a799376c9a42214f2d1debf2d0c3cb657d9c8bbf4f70bf3fb4aec
 F ext/userauth/sqlite3userauth.h 7f3ea8c4686db8e40b0a0e7a8e0b00fac13aa7a3
@@ -462,7 +462,7 @@ F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
 F src/btree.c 958939f608e351a36756e3749596472baa0e5aae54eebd14e6beffe7a68aafc7
 F src/btree.h c11446f07ec0e9dc85af8041cb0855c52f5359c8b2a43e47e02a685282504d89
 F src/btreeInt.h 6111c15868b90669f79081039d19e7ea8674013f907710baa3c814dc3f8bfd3f
-F src/build.c 55a1fce8a223961f7749e4f858c77e488d3509855f252b9f2dd17489c0555528
+F src/build.c 61655dad911a967a69fb49df57268fd15ce8f1af3fe0a1bd90c128ef2cacfb7a
 F src/callback.c 25dda5e1c2334a367b94a64077b1d06b2553369f616261ca6783c48bcb6bda73
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/ctime.c 109e58d00f62e8e71ee1eb5944ac18b90171c928ab2e082e058056e1137cc20b
@@ -475,8 +475,8 @@ F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c bd0138acdc008c1845ccf92f8e73787880562de649471804801c06fed814c765
 F src/func.c 2ccf4ae12430b1ae7096be5f0675887e1bd0732828af0ac0f7496339b7c6edee
 F src/global.c 0dea3065ea72a65ae941559b6686aad6516d4913e76fa4f79a95ff7787f624ec
-F src/hash.c a12580e143f10301ed5166ea4964ae2853d3905a511d4e0c44497245c7ce1f7a
-F src/hash.h ab34c5c54a9e9de2e790b24349ba5aab3dbb4fd4
+F src/hash.c 8d7dda241d0ebdafb6ffdeda3149a412d7df75102cecfc1021c98d6219823b19
+F src/hash.h 9d56a9079d523b648774c1784b74b89bd93fac7b365210157482e4319a468f38
 F src/hwtime.h 747c1bbe9df21a92e9c50f3bbec1de841dc5e5da
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c fc3cf5c371f9a400144e8c2f148ab29cd3f67f7da7eaf47e6a6959f8255fd92c
@@ -594,14 +594,14 @@ F src/vdbe.c 711ef421b3bb3db3b2476067b2dc3c71ef5844d9b1a723026578f89f6da621e8
 F src/vdbe.h 712bca562eaed1c25506b9faf9680bdc75fc42e2f4a1cd518d883fa79c7a4237
 F src/vdbeInt.h 2c12704db9740c8e899786ecfc7a5797a9d067563496eb1b6ed03c592d7b8d90
 F src/vdbeapi.c a6e462bd7853e272cf614d6fbda7f3f20c89a2d255805855b32895a5983ddcec
-F src/vdbeaux.c 2b16b6735b99189e043378e90216e03522ddd02ecf2fc7aca779bd0553702984
+F src/vdbeaux.c f873b5c2efcf8a4d6ecfc5b1a5b06fd810419198f3bd882175d371cc03801873
 F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
 F src/vdbemem.c 8e6889761e344babdb8a56dd1ac8911501fa648396544d1644f1cd6a87c80dc0
 F src/vdbesort.c 31c7794a517e8b0a1704988f1f7596b74c6fc07eeb7bb85776f50a391ed9d94f
 F src/vdbetrace.c 79d6dbbc479267b255a7de8080eee6e729928a0ef93ed9b0bfa5618875b48392
 F src/vtab.c 4c5959e00b7a142198d178e3a822f4e05f36f2d1a3c57657373f9487154fc06b
 F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
-F src/wal.c 8bf87820896453ee3cca75f3082c57d7d82643e46cc089775612b18453732c12
+F src/wal.c 9eccc7ebb532a7b0fd3cabc16cff576b9afa763472272db67d84fb8cec96f5c0
 F src/wal.h 606292549f5a7be50b6227bd685fa76e3a4affad71bb8ac5ce4cb5c79f6a176a
 F src/walker.c 7607f1a68130c028255d8d56094ea602fc402c79e1e35a46e6282849d90d5fe4
 F src/where.c ff2955dc2743c1af05ba5a8232ab72724d9a63b76dbee256368f40fd3ef82db5
@@ -1818,7 +1818,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 0b6ae032c28e7fe34d81d1769f6e2901addbd1b95cd9a255dcef274061fb0164
-R f65e35fb7d023d9679dfd6f5ac3c1078
+P 07ee06fd390bfebebc014b47583d489747b0423bb96c810bed5c605ce0e3be71
+R b2ecaf35e009c36922e149aaa8d2b2c6
 U drh
-Z d5f121565d037d8ea5f3ddfdf63062a1
+Z 2c133b00e5aeb137166a48df07d40217
diff --git a/manifest.uuid b/manifest.uuid
index 7719a0f98d..f4f9bff615 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-07ee06fd390bfebebc014b47583d489747b0423bb96c810bed5c605ce0e3be71
\ No newline at end of file
+c28c973ad6debd63f13e5d4d3da036f680baaec9d863eda039f2747db9f1cfd5
\ No newline at end of file
diff --git a/src/build.c b/src/build.c
index 0c89497a54..9ecd31b8e8 100644
--- a/src/build.c
+++ b/src/build.c
@@ -3768,7 +3768,7 @@ void *sqlite3ArrayAllocate(
   int *pIdx         /* Write the index of a new slot here */
 ){
   char *z;
-  sqlite3_int64 n = *pnEntry;
+  sqlite3_int64 n = *pIdx = *pnEntry;
   if( (n & (n-1))==0 ){
     sqlite3_int64 sz = (n==0) ? 1 : 2*n;
     void *pNew = sqlite3DbRealloc(db, pArray, sz*szEntry);
@@ -3780,7 +3780,6 @@ void *sqlite3ArrayAllocate(
   }
   z = (char*)pArray;
   memset(&z[n * szEntry], 0, szEntry);
-  *pIdx = n;
   ++*pnEntry;
   return pArray;
 }
diff --git a/src/hash.c b/src/hash.c
index 79bb85ac01..96f41361b8 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -150,7 +150,7 @@ static HashElem *findElementWithHash(
   unsigned int *pHash /* Write the hash value here */
 ){
   HashElem *elem;                /* Used to loop thru the element list */
-  int count;                     /* Number of elements left to test */
+  unsigned int count;            /* Number of elements left to test */
   unsigned int h;                /* The computed hash */
   static HashElem nullElement = { 0, 0, 0, 0 };
 
@@ -198,8 +198,8 @@ static void removeElementGivenHash(
     if( pEntry->chain==elem ){
       pEntry->chain = elem->next;
     }
+    assert( pEntry->count>0 );
     pEntry->count--;
-    assert( pEntry->count>=0 );
   }
   sqlite3_free( elem );
   pH->count--;
diff --git a/src/hash.h b/src/hash.h
index 90540eda50..951cc06c90 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -45,7 +45,7 @@ struct Hash {
   unsigned int count;       /* Number of entries in this table */
   HashElem *first;          /* The first element of the array */
   struct _ht {              /* the hash table */
-    int count;                 /* Number of entries with this hash */
+    unsigned int count;        /* Number of entries with this hash */
     HashElem *chain;           /* Pointer to first entry with this hash */
   } *ht;
 };
diff --git a/src/vdbeaux.c b/src/vdbeaux.c
index 696748113f..822c6fe60c 100644
--- a/src/vdbeaux.c
+++ b/src/vdbeaux.c
@@ -159,7 +159,7 @@ static int growOpArray(Vdbe *v, int nOp){
                         : (sqlite3_int64)v->nOpAlloc+nOp);
 #else
   sqlite3_int64 nNew = (v->nOpAlloc ? 2*(sqlite3_int64)v->nOpAlloc
-                        : (sqlite3_int64)1024/sizeof(Op));
+                        : (sqlite3_int64)(1024/sizeof(Op)));
   UNUSED_PARAMETER(nOp);
 #endif
 
@@ -2068,9 +2068,9 @@ void sqlite3VdbeIOTraceSql(Vdbe *p){
 ** of a ReusableSpace object by the allocSpace() routine below.
 */
 struct ReusableSpace {
-  u8 *pSpace;          /* Available memory */
-  int nFree;           /* Bytes of available memory */
-  int nNeeded;         /* Total bytes that could not be allocated */
+  u8 *pSpace;            /* Available memory */
+  sqlite3_int64 nFree;   /* Bytes of available memory */
+  sqlite3_int64 nNeeded; /* Total bytes that could not be allocated */
 };
 
 /* Try to allocate nByte bytes of 8-byte aligned bulk memory for pBuf
@@ -2090,7 +2090,7 @@ struct ReusableSpace {
 static void *allocSpace(
   struct ReusableSpace *p,  /* Bulk memory available for allocation */
   void *pBuf,               /* Pointer to a prior allocation */
-  int nByte                 /* Bytes of memory needed */
+  sqlite3_int64 nByte       /* Bytes of memory needed */
 ){
   assert( EIGHT_BYTE_ALIGNMENT(p->pSpace) );
   if( pBuf==0 ){
diff --git a/src/wal.c b/src/wal.c
index bf1188da47..845ac56792 100644
--- a/src/wal.c
+++ b/src/wal.c
@@ -575,7 +575,7 @@ static SQLITE_NOINLINE int walIndexPageRealloc(
 
   /* Enlarge the pWal->apWiData[] array if required */
   if( pWal->nWiData<=iPage ){
-    int nByte = sizeof(u32*)*(iPage+1);
+    sqlite3_int64 nByte = sizeof(u32*)*(iPage+1);
     volatile u32 **apNew;
     apNew = (volatile u32 **)sqlite3_realloc64((void *)pWal->apWiData, nByte);
     if( !apNew ){
@@ -679,6 +679,7 @@ static void walChecksumBytes(
 
   assert( nByte>=8 );
   assert( (nByte&0x00000007)==0 );
+  assert( nByte<=65536 );
 
   if( nativeCksum ){
     do {
@@ -1616,7 +1617,7 @@ static int walIteratorInit(Wal *pWal, u32 nBackfill, WalIterator **pp){
   WalIterator *p;                 /* Return value */
   int nSegment;                   /* Number of segments to merge */
   u32 iLast;                      /* Last frame in log */
-  int nByte;                      /* Number of bytes to allocate */
+  sqlite3_int64 nByte;            /* Number of bytes to allocate */
   int i;                          /* Iterator variable */
   ht_slot *aTmp;                  /* Temp space used by merge-sort */
   int rc = SQLITE_OK;             /* Return Code */