diff --git a/manifest b/manifest
index 2a57b8910a..f2f7fe2498 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sthe\scrashtest\starget\sto\sMakefile.in.\s\sAdd\sLL\ssuffix\sto\slong\slong\sconstants\nin\sthe\svdbe.\s\sComment\schanges\sto\svdbeaux.c.\s(CVS\s1780)
-D 2004-06-30T11:41:55
+C Coverage\simprovements\sfor\smalloc\sand\svdbemem.c\s(CVS\s1781)
+D 2004-06-30T11:54:07
 F Makefile.in f5788bf4daea9b25424df5ccb529ac3438efb2b2
 F Makefile.linux-gcc a9e5a0d309fa7c38e7c14d3ecf7690879d3a5457
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -38,7 +38,7 @@ F src/hash.c 148e3512f1b4e90f8477f852c70b36a137b116a7
 F src/hash.h 762d95f1e567664d1eafc1687de755626be962fb
 F src/insert.c d99ffe87e1e1397f4233afcd06841d52d6b17b18
 F src/legacy.c ad23746f15f67e34577621b1875f639c94839e1f
-F src/main.c adb17bee0606a685d8872bdac9f23464e2c6a748
+F src/main.c 9cb3598be553c6e247e7ad7e9c41a9a0c38c7211
 F src/md5.c 7ae1c39044b95de2f62e066f47bb1deb880a1070
 F src/os.h d1780e0db95cad01f213d48da22ab490eb4fd345
 F src/os_common.h fe9604754116bd2f2702d58f82d2d8b89998cb21
@@ -50,7 +50,7 @@ F src/os_unix.c 7df6ae05faa5b84164193d3694cb71b66661bbf3
 F src/os_unix.h 00c1f82b526ab2fb7ee5ddd555ea4ed68363c93a
 F src/os_win.c 84549f6cc815237533c5d0eb3697352b03478d96
 F src/os_win.h babd4e912967c6b09088cfe38a45e8005a07ba44
-F src/pager.c 7f30e724959a04011dd077a923ea16b53561ee6c
+F src/pager.c 5f8cdc92ee9efb5a7849dc8b561b53122b700c78
 F src/pager.h 269b6cfc114dba0148203446e41dd19f9647dd53
 F src/parse.y 51c8e696276c409618e66a4ccf316fcff245506e
 F src/pragma.c 8326df8c400f573eb43004dfb8e53e5102acb3e4
@@ -61,7 +61,7 @@ F src/shell.c ebec5da57ea401f4886eefc790917b939d94d595
 F src/sqlite.h.in b70fded2bdfeaddfb06adea3888118b722975136
 F src/sqliteInt.h 9dcfcc67fc995b9079074d6b9619a1d4335583d0
 F src/table.c 4521c278892f60e4d630788c0ea5cf4db1e75c49
-F src/tclsqlite.c f72288553ca3cdaf686baab4b1797dd98140c501
+F src/tclsqlite.c 0bdfed5cc93826a261dead2ad31502056bcf6e92
 F src/test1.c 470430e194e43abb7d05b993fb360344f3d58834
 F src/test2.c dafd8bd314a554bf376c6d3a8c83fd69219f5a40
 F src/test3.c d0c56667e89f79ad0f060fdf010d1c34a4bc2988
@@ -76,9 +76,9 @@ F src/vacuum.c b8546f4921719458cc537b9e736df52a8256399c
 F src/vdbe.c 4e756ef91c9eb9ffd3dd5be17bda9d5bf2755a3e
 F src/vdbe.h 75b241c02431b9c0f16eaa9cdbb34146c6287f52
 F src/vdbeInt.h 7160653a006b6d2c4a00d204112a095bdf842ab6
-F src/vdbeapi.c 7c3c3d818fad427881b65c51999d06bf393ebeaf
+F src/vdbeapi.c 1d2a0bc5033a677f414c592aacd5d02f07ebbef5
 F src/vdbeaux.c 4de85e30ca4a83ea0a45eceb7e88ac7a48f4c237
-F src/vdbemem.c 053f8adcb644bca1c1e4ad08f4016cb7ee6bf1b8
+F src/vdbemem.c bbf621377343bee046547712a144a94f387bb1eb
 F src/where.c 6507074d8ce3f78e7a4cd33f667f11e62020553e
 F test/all.test 3b692eb43583b52c99c344b2fa8934512d179016
 F test/attach.test 3acdffccbf5f78b07746771b9490758718e28856
@@ -233,7 +233,7 @@ F www/tclsqlite.tcl 19191cf2a1010eaeff74c51d83fd5f5a4d899075
 F www/vdbe.tcl 59288db1ac5c0616296b26dce071c36cb611dfe9
 F www/version3.tcl 563ba3ac02f64da27ab17f3edbe8e56bfd0293fb
 F www/whentouse.tcl a8335bce47cc2fddb07f19052cb0cb4d9129a8e4
-P a3c38a6d286ab37a9cdcc8b2243ea3258cc61ff0
-R f3dc92bc418113954f3540b52554dd34
-U drh
-Z 78fbbed92b6b5d99dca4a6b3397cf5af
+P 42553001954356c942b874e95277efe235ef7692
+R 60019ba81d7b4ee61c8fcace4daff4a1
+U danielk1977
+Z 3bf0bd77bf9abeca54609b89ed1a42c8
diff --git a/manifest.uuid b/manifest.uuid
index 3f39f5f8ca..b0c5cc4830 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-42553001954356c942b874e95277efe235ef7692
\ No newline at end of file
+a98dd004c4d328eb44a71fecdbf8c5ab416dc524
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 4909688da7..2beacd564b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: main.c,v 1.243 2004/06/30 09:49:24 danielk1977 Exp $
+** $Id: main.c,v 1.244 2004/06/30 11:54:07 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -748,7 +748,7 @@ int sqlite3_create_function(
   }
 
   p = sqlite3FindFunction(db, zFunctionName, nName, nArg, enc, 1);
-  if( p==0 ) return 1;
+  if( p==0 ) return SQLITE_NOMEM;
   p->xFunc = xFunc;
   p->xStep = xStep;
   p->xFinalize = xFinal;
@@ -1180,6 +1180,9 @@ static int openDatabase(
   }
 
 opendb_out:
+  if( sqlite3_errcode(db)==SQLITE_OK && sqlite3_malloc_failed ){
+    sqlite3Error(db, SQLITE_NOMEM, 0);
+  }
   *ppDb = db;
   return sqlite3_errcode(db);
 }
diff --git a/src/pager.c b/src/pager.c
index 94bdbda61c..b7a83ffb95 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.148 2004/06/30 09:49:24 danielk1977 Exp $
+** @(#) $Id: pager.c,v 1.149 2004/06/30 11:54:07 danielk1977 Exp $
 */
 #include "os.h"         /* Must be first to enable large file support */
 #include "sqliteInt.h"
@@ -1383,7 +1383,7 @@ static int sqlite3pager_opentemp(char *zFile, OsFile *fd){
     cnt--;
     sqlite3OsTempFileName(zFile);
     rc = sqlite3OsOpenExclusive(zFile, fd, 1);
-  }while( cnt>0 && rc!=SQLITE_OK );
+  }while( cnt>0 && rc!=SQLITE_OK && rc!=SQLITE_NOMEM );
   return rc;
 }
 
diff --git a/src/tclsqlite.c b/src/tclsqlite.c
index a1c0bb3cb6..652f65f099 100644
--- a/src/tclsqlite.c
+++ b/src/tclsqlite.c
@@ -11,7 +11,7 @@
 *************************************************************************
 ** A TCL Interface to SQLite
 **
-** $Id: tclsqlite.c,v 1.93 2004/06/29 13:41:21 danielk1977 Exp $
+** $Id: tclsqlite.c,v 1.94 2004/06/30 11:54:07 danielk1977 Exp $
 */
 #ifndef NO_TCL     /* Omit this whole file if TCL is unavailable */
 
@@ -1081,7 +1081,10 @@ static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
 #ifdef SQLITE_TEST
   {
     extern void Md5_Register(sqlite*);
+    int mallocfail = sqlite3_iMallocFail;
+    sqlite3_iMallocFail = 0;
     Md5_Register(p->db);
+    sqlite3_iMallocFail = mallocfail;
    }
 #endif  
   p->interp = interp;
diff --git a/src/vdbeapi.c b/src/vdbeapi.c
index 6f0fbb20a9..e8e389ca37 100644
--- a/src/vdbeapi.c
+++ b/src/vdbeapi.c
@@ -29,18 +29,10 @@ const void *sqlite3_value_blob(sqlite3_value *pVal){
   }
 }
 int sqlite3_value_bytes(sqlite3_value *pVal){
-  Mem *p = (Mem*)pVal;
-  if( (p->flags & MEM_Blob)!=0 || sqlite3_value_text(pVal) ){
-    return p->n;
-  }
-  return 0;
+  return sqlite3ValueBytes(pVal, SQLITE_UTF8);
 }
 int sqlite3_value_bytes16(sqlite3_value *pVal){
-  Mem *p = (Mem*)pVal;
-  if( (p->flags & MEM_Blob)!=0 || sqlite3_value_text16(pVal) ){
-    return ((Mem *)pVal)->n;
-  }
-  return 0;
+  return sqlite3ValueBytes(pVal, SQLITE_UTF16NATIVE);
 }
 double sqlite3_value_double(sqlite3_value *pVal){
   return sqlite3VdbeRealValue((Mem*)pVal);
diff --git a/src/vdbemem.c b/src/vdbemem.c
index 7f26c7dd69..44848b34a5 100644
--- a/src/vdbemem.c
+++ b/src/vdbemem.c
@@ -104,88 +104,75 @@ int sqlite3VdbeMemMakeWriteable(Mem *pMem){
 ** Make sure the given Mem is \u0000 terminated.
 */
 int sqlite3VdbeMemNulTerminate(Mem *pMem){
-  if( (pMem->flags & MEM_Term)!=0 || (pMem->flags & (MEM_Str|MEM_Blob))==0 ){
+  /* In SQLite, a string without a nul terminator occurs when a string
+  ** is loaded from disk (in this case the memory management is ephemeral),
+  ** or when it is supplied by the user as a bound variable or function
+  ** return value. Therefore, the memory management of the string must be
+  ** either ephemeral, static or controlled by a user-supplied destructor.
+  */
+  assert(                         
+    !(pMem->flags&MEM_Str) ||                /* it's not a string, or      */
+    (pMem->flags&MEM_Term) ||                /* it's nul term. already, or */
+    (pMem->flags&(MEM_Ephem|MEM_Static)) ||  /* it's static or ephem, or   */
+    (pMem->flags&MEM_Dyn && pMem->xDel)      /* external management        */
+  );
+  if( (pMem->flags & MEM_Term)!=0 || (pMem->flags & MEM_Str)==0 ){
     return SQLITE_OK;   /* Nothing to do */
   }
 
   if( pMem->flags & (MEM_Static|MEM_Ephem) ){
     return sqlite3VdbeMemMakeWriteable(pMem);
   }else{
-    if( pMem->flags & MEM_Dyn ){
-      if( pMem->xDel ){
-        char *z = sqliteMalloc(pMem->n+2);
-        if( !z ) return SQLITE_NOMEM;
-        memcpy(z, pMem->z, pMem->n);
-        pMem->xDel(pMem->z);
-        pMem->xDel = 0;
-        pMem->z = z;
-      }else{
-        pMem->z = sqliteRealloc(pMem->z, pMem->n+2);
-        if( !pMem->z ) return SQLITE_NOMEM;
-      }
-    }else{
-      assert( pMem->flags & MEM_Short );
-      if( pMem->n+2>NBFS ){
-        char *z = sqliteMalloc(pMem->n+2);
-        if( !z ) return SQLITE_NOMEM;
-        memcpy(z, pMem->z, pMem->n);
-        pMem->flags &= !(MEM_Short);
-        pMem->flags |= MEM_Dyn;
-        pMem->xDel = 0;
-        pMem->z = z;
-      }
-    }
-    pMem->z[pMem->n++] = 0;
-    pMem->z[pMem->n++] = 0;
+    char *z = sqliteMalloc(pMem->n+2);
+    if( !z ) return SQLITE_NOMEM;
+    memcpy(z, pMem->z, pMem->n);
+    z[pMem->n] = 0;
+    z[pMem->n+1] = 0;
+    pMem->xDel(pMem->z);
+    pMem->xDel = 0;
+    pMem->z = z;
   }
   return SQLITE_OK;
 }
 
 /*
-** Add MEM_Str to the set of representations for the given Mem.
-** A NULL is converted into an empty string.  Numbers are converted
-** using sqlite3_snprintf().  Converting a BLOB to a string is a
-** no-op.
+** Add MEM_Str to the set of representations for the given Mem.  Numbers
+** are converted using sqlite3_snprintf().  Converting a BLOB to a string
+** is a no-op.
 **
 ** Existing representations MEM_Int and MEM_Real are *not* invalidated.
-** But MEM_Null is.
+**
+** A MEM_Null value will never be passed to this function. This function is
+** used for converting values to text for returning to the user (i.e. via
+** sqlite3_value_text()), or for ensuring that values to be used as btree
+** keys are strings. In the former case a NULL pointer is returned the
+** user and the later is an internal programming error.
 */
 int sqlite3VdbeMemStringify(Mem *pMem, int enc){
   int rc = SQLITE_OK;
   int fg = pMem->flags;
+  u8 *z = pMem->zShort;
 
   assert( !(fg&(MEM_Str|MEM_Blob)) );
-  assert( fg&(MEM_Int|MEM_Real|MEM_Null) );
+  assert( fg&(MEM_Int|MEM_Real) );
 
-  if( fg & MEM_Null ){      
-    /* A NULL value is converted to a zero length string */
-    u8 *z = pMem->zShort;
-    z[0] = 0;
-    z[1] = 0;
-    pMem->flags = MEM_Str | MEM_Short | MEM_Term;
-    pMem->z = z;
-    pMem->n = 0;
-    pMem->enc = enc;
+  /* For a Real or Integer, use sqlite3_snprintf() to produce the UTF-8
+  ** string representation of the value. Then, if the required encoding
+  ** is UTF-16le or UTF-16be do a translation.
+  ** 
+  ** FIX ME: It would be better if sqlite3_snprintf() could do UTF-16.
+  */
+  if( fg & MEM_Real || (pMem->type==SQLITE_FLOAT) ){
+    sqlite3_snprintf(NBFS, z, "%.15g", pMem->r);
   }else{
-    /* For a Real or Integer, use sqlite3_snprintf() to produce the UTF-8
-    ** string representation of the value. Then, if the required encoding
-    ** is UTF-16le or UTF-16be do a translation.
-    ** 
-    ** FIX ME: It would be better if sqlite3_snprintf() could do UTF-16.
-    */
-    u8 *z = pMem->zShort;
-    if( fg & MEM_Real || (pMem->type==SQLITE_FLOAT) ){
-      sqlite3_snprintf(NBFS, z, "%.15g", pMem->r);
-    }else{
-      assert( fg & MEM_Int );
-      sqlite3_snprintf(NBFS, z, "%lld", pMem->i);
-    }
-    pMem->n = strlen(z);
-    pMem->z = z;
-    pMem->enc = SQLITE_UTF8;
-    pMem->flags |= MEM_Str | MEM_Short | MEM_Term;
-    sqlite3VdbeChangeEncoding(pMem, enc);
+    assert( fg & MEM_Int );
+    sqlite3_snprintf(NBFS, z, "%lld", pMem->i);
   }
+  pMem->n = strlen(z);
+  pMem->z = z;
+  pMem->enc = SQLITE_UTF8;
+  pMem->flags |= MEM_Str | MEM_Short | MEM_Term;
+  sqlite3VdbeChangeEncoding(pMem, enc);
   return rc;
 }
 
@@ -331,16 +318,12 @@ int sqlite3VdbeMemCopy(Mem *pTo, const Mem *pFrom){
 ** deleted. pFrom contains an SQL NULL when this routine returns.
 */
 int sqlite3VdbeMemMove(Mem *pTo, Mem *pFrom){
-  int rc = SQLITE_OK;
-  if( !(pFrom->flags&MEM_Dyn && pFrom->xDel) ){
-    memcpy(pTo, pFrom, sizeof(Mem));
-    if( pFrom->flags & MEM_Short ){
-      pTo->z = pTo->zShort;
-    }
-  }else{
-    rc = sqlite3VdbeMemCopy(pTo, pFrom);
-    sqlite3VdbeMemRelease(pFrom);
+  memcpy(pTo, pFrom, sizeof(Mem));
+  if( pFrom->flags & MEM_Short ){
+    pTo->z = pTo->zShort;
   }
+  pFrom->flags = MEM_Null;
+  pFrom->xDel = 0;
   return SQLITE_OK;
 }