Index: src/printf.c
==================================================================
--- src/printf.c
+++ src/printf.c
@@ -398,16 +398,17 @@
         }
         if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
           nOut = etBUFSIZE;
           zOut = buf;
         }else{
-          nOut = precision + 10 + precision/3;
-          zOut = zExtra = sqlite3Malloc( nOut );
+          u64 n = (u64)precision + 10 + precision/3;
+          zOut = zExtra = sqlite3Malloc( n );
           if( zOut==0 ){
             setStrAccumError(pAccum, STRACCUM_NOMEM);
             return;
           }
+          nOut = (int)n;
         }
         bufpt = &zOut[nOut-1];
         if( xtype==etORDINAL ){
           static const char zOrd[] = "thstndrd";
           int x = (int)(longvalue % 10);