1 files changed, 10 insertions, 11 deletions

diff --git a/src/test6.c b/src/test6.c
index c151ea4..306482d 100644
--- a/src/test6.c
+++ b/src/test6.c
@@ -133,9 +133,9 @@ struct CrashFile {
   ** OsFileSize() calls. Although both could be done by traversing the
   ** write-list, in practice this is impractically slow.
   */
-  int iSize;                           /* Size of file in bytes */
-  int nData;                           /* Size of buffer allocated at zData */
   u8 *zData;                           /* Buffer containing file contents */
+  int nData;                           /* Size of buffer allocated at zData */
+  i64 iSize;                           /* Size of file in bytes */
 };
 
 struct CrashGlobal {
@@ -173,9 +173,6 @@ static void *crash_realloc(void *p, int n){
 static int writeDbFile(CrashFile *p, u8 *z, i64 iAmt, i64 iOff){
   int rc = SQLITE_OK;
   int iSkip = 0;
-  if( iOff==PENDING_BYTE && (p->flags&SQLITE_OPEN_MAIN_DB) ){
-    iSkip = 512;
-  }
   if( (iAmt-iSkip)>0 ){
     rc = sqlite3OsWrite(p->pRealFile, &z[iSkip], (int)(iAmt-iSkip), iOff+iSkip);
   }
@@ -409,13 +406,17 @@ static int cfRead(
   sqlite_int64 iOfst
 ){
   CrashFile *pCrash = (CrashFile *)pFile;
+  int nCopy = (int)MIN((i64)iAmt, (pCrash->iSize - iOfst));
+
+  if( nCopy>0 ){
+    memcpy(zBuf, &pCrash->zData[iOfst], nCopy);
+  }
 
   /* Check the file-size to see if this is a short-read */
-  if( pCrash->iSize<(iOfst+iAmt) ){
+  if( nCopy<iAmt ){
     return SQLITE_IOERR_SHORT_READ;
   }
 
-  memcpy(zBuf, &pCrash->zData[iOfst], iAmt);
   return SQLITE_OK;
 }
 
@@ -621,7 +622,7 @@ static int cfOpen(
     pWrapper->flags = flags;
   }
   if( rc==SQLITE_OK ){
-    pWrapper->nData = (4096 + pWrapper->iSize);
+    pWrapper->nData = (int)(4096 + pWrapper->iSize);
     pWrapper->zData = crash_malloc(pWrapper->nData);
     if( pWrapper->zData ){
       /* os_unix.c contains an assert() that fails if the caller attempts
@@ -632,14 +633,12 @@ static int cfOpen(
       ** UPDATE: It also contains an assert() verifying that each call
       ** to the xRead() method reads less than 128KB of data.
       */
-      const int isDb = (flags&SQLITE_OPEN_MAIN_DB);
       i64 iOff;
 
       memset(pWrapper->zData, 0, pWrapper->nData);
       for(iOff=0; iOff<pWrapper->iSize; iOff += 512){
-        int nRead = pWrapper->iSize - (int)iOff;
+        int nRead = (int)(pWrapper->iSize - iOff);
         if( nRead>512 ) nRead = 512;
-        if( isDb && iOff==PENDING_BYTE ) continue;
         rc = sqlite3OsRead(pReal, &pWrapper->zData[iOff], nRead, iOff);
       }
     }else{