diff --git a/manifest b/manifest
index d429981aa2..a41b294dc1 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Version\s2.7.3\s(CVS\s775)
-D 2002-10-31T00:15:10
+C Improvements\sin\sthreadtest.c\s(for\sUnix)\sand\ssome\sminor\sbug\sfixes\sthat\sresult\nfrom\sthe\sbetter\stesting.\s(CVS\s776)
+D 2002-11-01T01:55:37
 F Makefile.in d6c9a85c2a5e696843201d090dcf8bf2f8716f2a
 F Makefile.linux-gcc b86a99c493a5bfb402d1d9178dcdc4bd4b32f906
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -28,7 +28,7 @@ F src/func.c e45cd908b9b723d9b91473d09e12c23f786b3fc2
 F src/hash.c 6a6236b89c8c060c65dabd300a1c8ce7c10edb72
 F src/hash.h cd0433998bc1a3759d244e1637fe5a3c13b53bf8
 F src/insert.c 764300a0bd8074a2174946c0bf8a550bd833397a
-F src/main.c ff7c05ef88fa1374e5540ce20173ae8e1836f8a4
+F src/main.c b95d7eeec90f86d05b6a064d07db34b7279e06d4
 F src/md5.c fe4f9c9c6f71dfc26af8da63e4d04489b1430565
 F src/os.c ede7346dffdbab40c6de20d2f325981f3f1168fd
 F src/os.h 3009379b06941e7796a9812d1b6cbc59b26248c8
@@ -47,12 +47,12 @@ F src/tclsqlite.c fa646506f02509455c1e4a878d1303bd2d4c3ead
 F src/test1.c a46e9f61915b32787c5d5a05a4b92e4dacc437d9
 F src/test2.c 5fa694d130b3309e3f9c852f0a437750fcb5a006
 F src/test3.c 540fa7fc3cb3732517b779b5f90ad9cc4303d0ab
-F src/threadtest.c 72bce0a284647314847bbea44616ceb056bfb77f
+F src/threadtest.c d641a5219e718e18a1a80a50eb9bb549f451f42e
 F src/tokenize.c 75e3bb37305b64e118e709752066f494c4f93c30
 F src/trigger.c 5ba917fc226b96065108da28186c2efaec53e481
 F src/update.c 881e4c8e7c786545da4fd2d95da19252b2e31137
 F src/util.c ca7650ef2cc2d50241e48029fca109a3016144ee
-F src/vdbe.c 921f75ea3fbf2df4480c1ec9f8522843d5839997
+F src/vdbe.c a187467bc4e9ef7793969b5010d7297341b19394
 F src/vdbe.h b7584044223104ba7896a7f87b66daebdd6022ba
 F src/where.c 615a0f0bed305bcb27073c69347ea75018e8b58d
 F test/all.test efd958d048c70a3247997c482f0b33561f7759f0
@@ -149,7 +149,7 @@ F www/speed.tcl a20a792738475b68756ea7a19321600f23d1d803
 F www/sqlite.tcl ae3dcfb077e53833b59d4fcc94d8a12c50a44098
 F www/tclsqlite.tcl 1db15abeb446aad0caf0b95b8b9579720e4ea331
 F www/vdbe.tcl 2013852c27a02a091d39a766bc87cff329f21218
-P 8ad018944c3aa8f58e1c68b1fa634ef922d6476f
-R f8477ebc66610cd7938692d7ec68ce06
+P 4051dbdb0552620eaff2ccef02f64a2ff97a8dfb
+R c21e2859a962756f67fcca7d8aada8c6
 U drh
-Z e70ab099db1c57aeafd8f952a2b6f584
+Z fd6af700160d9f9561f1698c6ec1c692
diff --git a/manifest.uuid b/manifest.uuid
index 55eb74f1f5..f618cb814a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-4051dbdb0552620eaff2ccef02f64a2ff97a8dfb
\ No newline at end of file
+326e0983c34b584a3c4a2300399bff0a8281b9f8
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index c4df2e1238..03bd734067 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 1.102 2002/09/05 23:21:37 drh Exp $
+** $Id: main.c,v 1.103 2002/11/01 01:55:37 drh Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -613,6 +613,10 @@ int sqlite_exec(
       sqliteSafetyOff(db);
       return rc;
     }
+    if( pzErrMsg ){
+      sqliteFree(*pzErrMsg);
+      *pzErrMsg = 0;
+    }
   }
   if( db->file_format<3 ){
     sqliteSafetyOff(db);
diff --git a/src/threadtest.c b/src/threadtest.c
index b85f7d6abc..89c79a4c7c 100644
--- a/src/threadtest.c
+++ b/src/threadtest.c
@@ -20,11 +20,17 @@
 */
 #include "sqlite.h"
 #include <pthread.h>
+#include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
+/*
+** Enable for tracing
+*/
+static int verbose = 0;
+
 /*
 ** Come here to die.
 */
@@ -35,6 +41,16 @@ static void Exit(int rc){
 extern char *sqlite_mprintf(const char *zFormat, ...);
 extern char *sqlite_vmprintf(const char *zFormat, va_list);
 
+/*
+** When a lock occurs, yield.
+*/
+static int db_is_locked(void *NotUsed, const char *zNotUsed, int iNotUsed){
+  /* sched_yield(); */
+  if( verbose ) printf("BUSY %s\n", (char*)NotUsed);
+  usleep(100);
+  return 1;
+}
+
 /*
 ** Used to accumulate query results by db_query()
 */
@@ -64,7 +80,7 @@ static int db_query_callback(
     }
     pResult->azElem = realloc( pResult->azElem, pResult->nAlloc*sizeof(char*));
     if( pResult->azElem==0 ){
-      fprintf(stderr,"%s: malloc failed\n", pResult->zFile);
+      fprintf(stdout,"%s: malloc failed\n", pResult->zFile);
       return 1;
     }
   }
@@ -91,9 +107,15 @@ char **db_query(sqlite *db, const char *zFile, const char *zFormat, ...){
   va_end(ap);
   memset(&sResult, 0, sizeof(sResult));
   sResult.zFile = zFile;
+  if( verbose ) printf("QUERY %s: %s\n", zFile, zSql);
   rc = sqlite_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
+  if( rc==SQLITE_SCHEMA ){
+    if( zErrMsg ) free(zErrMsg);
+    rc = sqlite_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
+  }
+  if( verbose ) printf("DONE %s %s\n", zFile, zSql);
   if( zErrMsg ){
-    fprintf(stderr,"%s: query failed: %s - %s\n", zFile, zSql, zErrMsg);
+    fprintf(stdout,"%s: query failed: %s - %s\n", zFile, zSql, zErrMsg);
     free(zErrMsg);
     free(zSql);
     Exit(1);
@@ -117,9 +139,15 @@ void db_execute(sqlite *db, const char *zFile, const char *zFormat, ...){
   va_start(ap, zFormat);
   zSql = sqlite_vmprintf(zFormat, ap);
   va_end(ap);
+  if( verbose ) printf("EXEC %s: %s\n", zFile, zSql);
   rc = sqlite_exec(db, zSql, 0, 0, &zErrMsg);
+  if( rc==SQLITE_SCHEMA ){
+    if( zErrMsg ) free(zErrMsg);
+    rc = sqlite_exec(db, zSql, 0, 0, &zErrMsg);
+  }
+  if( verbose ) printf("DONE %s: %s\n", zFile, zSql);
   if( zErrMsg ){
-    fprintf(stderr,"%s: command failed: %s - %s\n", zFile, zSql, zErrMsg);
+    fprintf(stdout,"%s: command failed: %s - %s\n", zFile, zSql, zErrMsg);
     free(zErrMsg);
     sqlite_freemem(zSql);
     Exit(1);
@@ -148,7 +176,7 @@ void db_check(const char *zFile, const char *zMsg, char **az, ...){
   va_start(ap, az);
   for(i=0; (z = va_arg(ap, char*))!=0; i++){
     if( az[i]==0 || strcmp(az[i],z)!=0 ){
-      fprintf(stderr,"%s: %s: bad result in column %d: %s\n",
+      fprintf(stdout,"%s: %s: bad result in column %d: %s\n",
         zFile, zMsg, i+1, az[i]);
       db_query_free(az);
       Exit(1);
@@ -166,6 +194,7 @@ static void *worker_bee(void *pArg){
   const char *zFilename = (char*)pArg;
   char *azErr;
   int i, cnt;
+  int t = atoi(zFilename);
   char **az;
   sqlite *db;
 
@@ -175,35 +204,36 @@ static void *worker_bee(void *pArg){
   printf("%s: START\n", zFilename);
   fflush(stdout);
   for(cnt=0; cnt<10; cnt++){
-    db = sqlite_open(zFilename, 0, &azErr);
+    db = sqlite_open(&zFilename[2], 0, &azErr);
     if( db==0 ){
-      fprintf(stderr,"%s: can't open\n", zFilename);
+      fprintf(stdout,"%s: can't open\n", zFilename);
       Exit(1);
     }
-    db_execute(db, zFilename, "BEGIN; CREATE TABLE t1(a,b,c);");
+    sqlite_busy_handler(db, db_is_locked, zFilename);
+    db_execute(db, zFilename, "CREATE TABLE t%d(a,b,c);", t);
     for(i=1; i<=100; i++){
-      db_execute(db, zFilename, "INSERT INTO t1 VALUES(%d,%d,%d);",
-         i, i*2, i*i);
+      db_execute(db, zFilename, "INSERT INTO t%d VALUES(%d,%d,%d);",
+         t, i, i*2, i*i);
     }
-    az = db_query(db, zFilename, "SELECT count(*) FROM t1");
-    db_check(zFilename, "t1 size", az, "100", 0);  
-    az = db_query(db, zFilename, "SELECT avg(b) FROM t1");
-    db_check(zFilename, "t1 avg", az, "101", 0);  
-    db_execute(db, zFilename, "DELETE FROM t1 WHERE a>50");
-    az = db_query(db, zFilename, "SELECT avg(b) FROM t1");
-    db_check(zFilename, "t1 avg2", az, "51", 0);
+    az = db_query(db, zFilename, "SELECT count(*) FROM t%d", t);
+    db_check(zFilename, "tX size", az, "100", 0);  
+    az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
+    db_check(zFilename, "tX avg", az, "101", 0);  
+    db_execute(db, zFilename, "DELETE FROM t%d WHERE a>50", t);
+    az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
+    db_check(zFilename, "tX avg2", az, "51", 0);
     for(i=1; i<=50; i++){
       char z1[30], z2[30];
-      az = db_query(db, zFilename, "SELECT b, c FROM t1 WHERE a=%d", i);
+      az = db_query(db, zFilename, "SELECT b, c FROM t%d WHERE a=%d", t, i);
       sprintf(z1, "%d", i*2);
       sprintf(z2, "%d", i*i);
       db_check(zFilename, "readback", az, z1, z2, 0);
     }
-    db_execute(db, zFilename, "COMMIT; DROP TABLE t1;");
+    db_execute(db, zFilename, "DROP TABLE t%d;", t);
     sqlite_close(db);
   }
   printf("%s: END\n", zFilename);
-  unlink(zFilename);
+  /* unlink(zFilename); */
   fflush(stdout);
   pthread_mutex_lock(&lock);
   thread_cnt--;
@@ -218,9 +248,19 @@ int main(int argc, char **argv){
   char *zFile;
   int i, n;
   pthread_t id;
+  if( argc>2 && strcmp(argv[1], "-v")==0 ){
+    verbose = 1;
+    argc--;
+    argv++;
+  }
   if( argc<2 || (n=atoi(argv[1]))<1 ) n = 10;
   for(i=0; i<n; i++){
-    zFile = sqlite_mprintf("testdb-%d", i+1);
+    char zBuf[200];
+    sprintf(zBuf, "testdb-%d", (i+1)/2);
+    unlink(zBuf);
+  }
+  for(i=0; i<n; i++){
+    zFile = sqlite_mprintf("%d.testdb-%d", i%2+1, (i+2)/2);
     unlink(zFile);
     pthread_create(&id, 0, worker_bee, (void*)zFile);
     pthread_detach(id);
@@ -230,5 +270,10 @@ int main(int argc, char **argv){
     pthread_cond_wait(&sig, &lock);
   }
   pthread_mutex_unlock(&lock);
+  for(i=0; i<n; i++){
+    char zBuf[200];
+    sprintf(zBuf, "testdb-%d", (i+1)/2);
+    unlink(zBuf);
+  }
   return 0;
 }
diff --git a/src/vdbe.c b/src/vdbe.c
index d58fa2cdfb..f5c5ca02bb 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -36,7 +36,7 @@
 ** in this file for details.  If in doubt, do not deviate from existing
 ** commenting and indentation practices when changing or adding code.
 **
-** $Id: vdbe.c,v 1.182 2002/10/30 22:42:59 drh Exp $
+** $Id: vdbe.c,v 1.183 2002/11/01 01:55:38 drh Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -4874,7 +4874,7 @@ case OP_MemLoad: {
   if( aStack[tos].flags & STK_Str ){
     zStack[tos] = p->aMem[i].z;
     aStack[tos].flags |= STK_Ephem;
-    aStack[tos].flags &= ~STK_Dyn;
+    aStack[tos].flags &= ~(STK_Dyn|STK_Static);
   }
   break;
 }
@@ -5306,6 +5306,7 @@ default: {
           fprintf(p->trace, " ???");
         }
       }
+      if( rc!=0 ) fprintf(p->trace," rc=%d",rc);
       fprintf(p->trace,"\n");
     }
 #endif