diff --git a/manifest b/manifest
index 52290c4f50..17009a8f99 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Try\sto\sget\sthreads\sworking\sagain\son\sLinux.\s(CVS\s1755)
-D 2004-06-29T03:29:00
+C Bug-fixes\sto\sget\sthe\stwo\sthreadtest\sC\sprograms\sworking\sagain.\s(CVS\s1756)
+D 2004-06-29T07:45:33
 F Makefile.in cb7a9889c38723f72b2506c4236ff30a05ff172b
 F Makefile.linux-gcc a9e5a0d309fa7c38e7c14d3ecf7690879d3a5457
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -28,7 +28,7 @@ F src/attach.c 73b16e608fc662e8602639e946582832b6f2902b
 F src/auth.c 60db23b98bb94c8b0178180faaf49dc116674217
 F src/btree.c ad428c56e42d748a0c1441fbbd93e41df407c31d
 F src/btree.h 934d0ad30b5b419e9291a11da878be349df2277e
-F src/build.c 574cdd30922ead0ababc717865aef9948c17701d
+F src/build.c ea8a3220574348b052e5c66e90c0619f3fd89863
 F src/date.c b3e8b2bef1e3f2ce24e5b057203036defb18c3f1
 F src/delete.c e81545e546f6bc87d7508a93a09ca70695265af3
 F src/encode.c a876af473d1d636faa3dca51c7571f2e007eea37
@@ -38,22 +38,22 @@ F src/hash.c 440c2f8cb373ee1b4e13a0988489c7cd95d55b6f
 F src/hash.h 762d95f1e567664d1eafc1687de755626be962fb
 F src/insert.c d99ffe87e1e1397f4233afcd06841d52d6b17b18
 F src/legacy.c ad23746f15f67e34577621b1875f639c94839e1f
-F src/main.c 6d27d09c9984d9b68a53b95fc2e327a19cd28851
+F src/main.c b2f25e2fe7ae2f930804694d01425f0ddfc51bee
 F src/md5.c 7ae1c39044b95de2f62e066f47bb1deb880a1070
 F src/os.h d1780e0db95cad01f213d48da22ab490eb4fd345
-F src/os_common.h ba1b7306e16e2091718f2c48db0fe6c1d7a31bb8
+F src/os_common.h 1e745e582138c01d995f190d7544da3e826f6b2f
 F src/os_mac.c 3d31e26be1411acfb7961033098631b4f3486fdf
 F src/os_mac.h 51d2445f47e182ed32d3bd6937f81070c6fd9bd4
 F src/os_test.c ef353f73a2ad85a239d7a77c4a5df2e1377f3848
 F src/os_test.h 6a26a4978492e4bbdbf385554958418ff02db162
-F src/os_unix.c 2d787fd91a1b202ec6d0930b70982bc1ab816bb8
+F src/os_unix.c 8acbb7190cd6d91d076bd51da902daf2874bfbd2
 F src/os_unix.h 00c1f82b526ab2fb7ee5ddd555ea4ed68363c93a
 F src/os_win.c 84549f6cc815237533c5d0eb3697352b03478d96
 F src/os_win.h babd4e912967c6b09088cfe38a45e8005a07ba44
 F src/pager.c c1d5212e7cac86bc1a29d01a30d9dbbdb545dfd8
 F src/pager.h fe818866f6d1adcffeed88705e8df7e588cbaf13
 F src/parse.y e19e066e726a31d7b2d3e6475bdf55f7e339f8a3
-F src/pragma.c 2ca5ef7e27916f191a3b1201ad576ef6f8a8d72d
+F src/pragma.c b6df973670332adc6c211b111ee41dcf31ac183f
 F src/printf.c 3090c8ff397d549bc0de09b16d8ab7fd37a0c3f7
 F src/random.c eff68e3f257e05e81eae6c4d50a51eb88beb4ff3
 F src/select.c f02a65af34231031896e8442161cb5251e191e75
@@ -162,8 +162,8 @@ F test/tclsqlite.test 2517b10ee2c806fb700548f54540aec7d62ed14a
 F test/temptable.test 63a16e3ad19adf073cfbcdf7624c92ac5236522c
 F test/tester.tcl f36cc22d0532725073ca78272d7834d56dceb6d9
 F test/thread1.test 776c9e459b75ba905193b351926ac4019b049f35
-F test/threadtest1.c 1dd597369021ed72cd71c138a14a561d443f6edf
-F test/threadtest2.c c38c9c1769725ebe240317dcc6bbed13c600ac98
+F test/threadtest1.c 6029d9c5567db28e6dc908a0c63099c3ba6c383b
+F test/threadtest2.c 97a830d53c24c42290501fdfba4a6e5bdd34748b
 F test/trans.test 29645b344d2b9b6792793562b12340177ddd8f96
 F test/trigger1.test dc015c410161f1a6109fd52638dfac852e2a34de
 F test/trigger2.test 0767ab30cb5a2c8402c8524f3d566b410b6f5263
@@ -231,7 +231,7 @@ F www/tclsqlite.tcl 19191cf2a1010eaeff74c51d83fd5f5a4d899075
 F www/vdbe.tcl 59288db1ac5c0616296b26dce071c36cb611dfe9
 F www/version3.tcl 563ba3ac02f64da27ab17f3edbe8e56bfd0293fb
 F www/whentouse.tcl a8335bce47cc2fddb07f19052cb0cb4d9129a8e4
-P 332921041040b343b6b568685ff55d21a624f502
-R bdedb5a03f87b2291e0c7bb98d11a6cb
-U drh
-Z 23b6d4864c82370d472ac66ee3391b29
+P a8417cb83e9d070f46e7505f92a95f057b992658
+R f6a3ab8dfc5160d3b6066eb0982690ff
+U danielk1977
+Z 627f904ea791eadd909ab90d3df46fcf
diff --git a/manifest.uuid b/manifest.uuid
index e7412246b0..9ff384807a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-a8417cb83e9d070f46e7505f92a95f057b992658
\ No newline at end of file
+ffd3312b66e2657c3431eab814aadec254af2403
\ No newline at end of file
diff --git a/src/build.c b/src/build.c
index d3efc5d8a9..e785f16518 100644
--- a/src/build.c
+++ b/src/build.c
@@ -23,7 +23,7 @@
 **     ROLLBACK
 **     PRAGMA
 **
-** $Id: build.c,v 1.235 2004/06/28 01:11:47 danielk1977 Exp $
+** $Id: build.c,v 1.236 2004/06/29 07:45:33 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -147,7 +147,12 @@ Table *sqlite3LocateTable(Parse *pParse, const char *zName, const char *zDbase){
 
   p = sqlite3FindTable(pParse->db, zName, zDbase);
   if( p==0 ){
-    if( zDbase ){
+    if( !(pParse->db->flags & SQLITE_Initialized) ){
+      /* If the schema is not initialised at this point, it must be because
+      ** the database is locked. */
+      pParse->nErr++;
+      pParse->rc = SQLITE_BUSY;
+    }else if( zDbase ){
       sqlite3ErrorMsg(pParse, "no such table: %s.%s", zDbase, zName);
     }else if( sqlite3FindTable(pParse->db, zName, 0)!=0 ){
       sqlite3ErrorMsg(pParse, "table \"%s\" is not in database \"%s\"",
@@ -617,6 +622,7 @@ void sqlite3StartTable(
       sqlite3ErrorMsg(pParse, "unable to open a temporary database "
         "file for storing temporary tables");
       pParse->nErr++;
+      pParse->rc = rc;
       sqliteFree(zName);
       return;
     }
@@ -626,6 +632,7 @@ void sqlite3StartTable(
         sqlite3ErrorMsg(pParse, "unable to get a write lock on "
           "the temporary database file");
         sqliteFree(zName);
+        pParse->rc = rc;
         return;
       }
     }
diff --git a/src/main.c b/src/main.c
index ba2b5cefb7..7f3f52b6ff 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 1.237 2004/06/28 01:11:47 danielk1977 Exp $
+** $Id: main.c,v 1.238 2004/06/29 07:45:34 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -85,15 +85,18 @@ int sqlite3InitCallback(void *pInit, int argc, char **argv, char **azColName){
         ** structures that describe the table, index, or view.
         */
         char *zErr;
+        int rc;
         assert( db->init.busy );
         db->init.iDb = atoi(argv[4]);
         assert( db->init.iDb>=0 && db->init.iDb<db->nDb );
         db->init.newTnum = atoi(argv[2]);
-        if( sqlite3_exec(db, argv[3], 0, 0, &zErr) ){
+        rc = sqlite3_exec(db, argv[3], 0, 0, &zErr);
+        db->init.iDb = 0;
+        if( SQLITE_OK!=rc ){
           corruptSchema(pData, zErr);
           sqlite3_free(zErr);
+          return rc;
         }
-        db->init.iDb = 0;
       }else{
         /* If the SQL column is blank it means this is an index that
         ** was created to be the PRIMARY KEY or to fulfill a UNIQUE
@@ -118,8 +121,8 @@ int sqlite3InitCallback(void *pInit, int argc, char **argv, char **azColName){
           pIndex->tnum = atoi(argv[2]);
         }
       }
-      break;
     }
+    break;
     default: {
       /* This can not happen! */
       nErr = 1;
@@ -196,7 +199,11 @@ static int sqlite3InitOne(sqlite *db, int iDb, char **pzErrMsg){
   azArg[5] = 0;
   initData.db = db;
   initData.pzErrMsg = pzErrMsg;
-  sqlite3InitCallback(&initData, 5, (char **)azArg, 0);
+  rc = sqlite3InitCallback(&initData, 5, (char **)azArg, 0);
+  if( rc!=SQLITE_OK ){
+    sqlite3SafetyOn(db);
+    return rc;
+  }
   pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
   if( pTab ){
     pTab->readOnly = 1;
diff --git a/src/os_common.h b/src/os_common.h
index a8ac2707ae..48490e82a8 100644
--- a/src/os_common.h
+++ b/src/os_common.h
@@ -44,6 +44,8 @@ static unsigned int elapse;
 #define TRACE4(X,Y,Z,A)   if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A)
 #define TRACE5(X,Y,Z,A,B) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A,B)
 #define TRACE6(X,Y,Z,A,B,C) if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C)
+#define TRACE7(X,Y,Z,A,B,C,D) \
+    if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C,D)
 #else
 #define TIMER_START
 #define TIMER_END
diff --git a/src/os_unix.c b/src/os_unix.c
index c2309495eb..8ce1498702 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -759,6 +759,24 @@ int sqlite3OsCheckReservedLock(OsFile *id){
   return r;
 }
 
+#ifdef SQLITE_DEBUG
+/*
+** Helper function for printing out trace information from debugging
+** binaries. This returns the string represetation of the supplied
+** integer lock-type.
+*/
+static const char * locktypeName(int locktype){
+  switch( locktype ){
+  case NO_LOCK: return "NONE";
+  case SHARED_LOCK: return "SHARED";
+  case RESERVED_LOCK: return "RESERVED";
+  case PENDING_LOCK: return "PENDING";
+  case EXCLUSIVE_LOCK: return "EXCLUSIVE";
+  }
+  return "ERROR";
+}
+#endif
+
 /*
 ** Lock the file with the lock specified by parameter locktype - one
 ** of the following:
@@ -828,14 +846,16 @@ int sqlite3OsLock(OsFile *id, int locktype){
   int s;
 
   assert( id->isOpen );
-  TRACE6("LOCK %d %d was %d(%d,%d)\n",
-          id->h, locktype, id->locktype, pLock->locktype, pLock->cnt);
+  TRACE7("LOCK %d %s was %s(%s,%d) pid=%d\n", id->h, locktypeName(locktype), 
+      locktypeName(id->locktype), locktypeName(pLock->locktype), pLock->cnt
+      ,getpid() );
 
   /* If there is already a lock of this type or more restrictive on the
   ** OsFile, do nothing. Don't use the end_lock: exit path, as
   ** sqlite3OsEnterMutex() hasn't been called yet.
   */
   if( id->locktype>=locktype ){
+    TRACE3("LOCK %d %s ok (already held)\n", id->h, locktypeName(locktype));
     return SQLITE_OK;
   }
 
@@ -956,7 +976,8 @@ int sqlite3OsLock(OsFile *id, int locktype){
 
 end_lock:
   sqlite3OsLeaveMutex();
-  TRACE4("LOCK %d %d %s\n", id->h, locktype, rc==SQLITE_OK ? "ok" : "failed");
+  TRACE4("LOCK %d %s %s\n", id->h, locktypeName(locktype), 
+      rc==SQLITE_OK ? "ok" : "failed");
   return rc;
 }
 
@@ -974,8 +995,8 @@ int sqlite3OsUnlock(OsFile *id, int locktype){
   struct flock lock;
 
   assert( id->isOpen );
-  TRACE6("UNLOCK %d %d was %d(%d,%d)\n",
-          id->h, locktype, id->locktype, id->pLock->locktype, id->pLock->cnt);
+  TRACE7("UNLOCK %d %d was %d(%d,%d) pid=%d\n", id->h, locktype, id->locktype, 
+      id->pLock->locktype, id->pLock->cnt, getpid());
 
   assert( locktype<=SHARED_LOCK );
   if( id->locktype<=locktype ){
diff --git a/src/pragma.c b/src/pragma.c
index 469ccff054..a49de38b4c 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -11,7 +11,7 @@
 *************************************************************************
 ** This file contains code used to implement the PRAGMA command.
 **
-** $Id: pragma.c,v 1.54 2004/06/26 19:35:30 drh Exp $
+** $Id: pragma.c,v 1.55 2004/06/29 07:45:34 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -119,8 +119,10 @@ static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){
 ** Check to make sure the schema is loaded.  Return 1 if it is not.
 */
 static int checkSchema(Parse *pParse){
-  if( SQLITE_OK!=sqlite3ReadSchema(pParse->db, &pParse->zErrMsg) ){
+  int rc = sqlite3ReadSchema(pParse->db, &pParse->zErrMsg);
+  if( SQLITE_OK!=rc ){
     pParse->nErr++;
+    pParse->rc = rc;
     return 1;
   }
   return 0;
@@ -500,6 +502,7 @@ void sqlite3Pragma(
           cnt++;
         }
       }
+      assert( cnt>0 );
       sqlite3VdbeAddOp(v, OP_IntegrityCk, cnt, i);
       sqlite3VdbeAddOp(v, OP_Dup, 0, 1);
       addr = sqlite3VdbeOp3(v, OP_String8, 0, 0, "ok", P3_STATIC);
diff --git a/test/threadtest1.c b/test/threadtest1.c
index f5ff112e60..56fcce33e8 100644
--- a/test/threadtest1.c
+++ b/test/threadtest1.c
@@ -262,7 +262,16 @@ int main(int argc, char **argv){
   }
   for(i=0; i<n; i++){
     zFile = sqlite3_mprintf("%d.testdb-%d", i%2+1, (i+2)/2);
-    unlink(zFile);
+    if( (i%2)==0 ){
+      /* Remove both the database file and any old journal for the file
+      ** being used by this thread and the next one. */
+      char *zDb = &zFile[2];
+      char *zJournal = sqlite3_mprintf("%s-journal", zDb);
+      unlink(zDb);
+      unlink(zJournal);
+      free(zJournal);
+    }
+      
     pthread_create(&id, 0, worker_bee, (void*)zFile);
     pthread_detach(id);
   }
diff --git a/test/threadtest2.c b/test/threadtest2.c
index deaffdaf09..f16fd1a12e 100644
--- a/test/threadtest2.c
+++ b/test/threadtest2.c
@@ -96,7 +96,12 @@ int main(int argc, char **argv){
   int i, rc;
   pthread_t aThread[5];
 
-  if( strcmp(DB_FILE,":memory:") ) unlink(DB_FILE);
+  if( strcmp(DB_FILE,":memory:") ){
+    char *zJournal = sqlite3_mprintf("%s-journal", DB_FILE);
+    unlink(DB_FILE);
+    unlink(zJournal);
+    free(zJournal);
+  }  
   sqlite3_open(DB_FILE, &db);
   if( db==0 ){
     fprintf(stderr,"unable to initialize database\n");