Index: ext/lsm1/lsm_vtab.c
==================================================================
--- ext/lsm1/lsm_vtab.c
+++ ext/lsm1/lsm_vtab.c
@@ -593,10 +593,11 @@
   sqlite3_value **argv,
   sqlite_int64 *pRowid
 ){
   lsm1_vtab *p = (lsm1_vtab*)pVTab;
   const void *pKey;
+  void *pFree = 0;
   int nKey;
   int eType;
   int rc = LSM_OK;
   sqlite3_value *pValue;
   const unsigned char *pVal;
@@ -627,10 +628,11 @@
     /* Use a key encoding that sorts in lexicographical order */
     rc = lsm1EncodeKey(argv[2+LSM1_COLUMN_KEY],
                        (unsigned char**)&pKey,&nKey,
                        pSpace,sizeof(pSpace));
     if( rc ) return rc;
+    if( pKey!=(const void*)pSpace ) pFree = (void*)pKey;
   }
   if( sqlite3_value_type(argv[2+LSM1_COLUMN_BLOBVALUE])==SQLITE_BLOB ){
     pVal = sqlite3_value_blob(argv[2+LSM1_COLUMN_BLOBVALUE]);
     nVal = sqlite3_value_bytes(argv[2+LSM1_COLUMN_BLOBVALUE]);
     rc = lsm_insert(p->pDb, pKey, nKey, pVal, nVal);
@@ -681,11 +683,11 @@
         rc = lsm_insert(p->pDb, pKey, nKey, &aVal[i], 9-i);
         break;
       }
     }
   }
-  if( pKey!=(const void*)pSpace ) sqlite3_free((void*)pKey);
+  sqlite3_free(pFree);
   return rc==LSM_OK ? SQLITE_OK : SQLITE_ERROR;
 }      
 
 /* Begin a transaction
 */

ADDED   ext/lsm1/test/lsm1_common.tcl
Index: ext/lsm1/test/lsm1_common.tcl
==================================================================
--- ext/lsm1/test/lsm1_common.tcl
+++ ext/lsm1/test/lsm1_common.tcl
@@ -0,0 +1,35 @@
+# 2014 Dec 19
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+
+if {![info exists testdir]} {
+  set testdir [file join [file dirname [info script]] .. .. .. test]
+}
+source $testdir/tester.tcl
+
+# Check if the lsm1 extension has been compiled.
+set lsm1 lsm1.so
+if {[file exists [file join .. $lsm1]]} {
+  proc return_if_no_lsm1 {} {}
+} else {
+  proc return_if_no_lsm1 {} {
+    finish_test
+    return -code return
+  }
+  return
+}
+
+proc load_lsm1_vtab {db} {
+  db enable_load_extension 1
+  db eval {SELECT load_extension('../lsm1')}
+}
+
+

ADDED   ext/lsm1/test/lsm1_simple.test
Index: ext/lsm1/test/lsm1_simple.test
==================================================================
--- ext/lsm1/test/lsm1_simple.test
+++ ext/lsm1/test/lsm1_simple.test
@@ -0,0 +1,56 @@
+# 2017 July 14
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#*************************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this script is testing the lsm1 virtual table module.
+#
+
+source [file join [file dirname [info script]] lsm1_common.tcl]
+set testprefix lsm1_simple
+return_if_no_lsm1
+load_lsm1_vtab db
+
+forcedelete testlsm.db
+
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE x1 USING lsm1(testlsm.db);
+  PRAGMA table_info(x1);
+} {
+  0 key       {} 0 {} 0 
+  1 blobkey   {} 0 {} 0 
+  2 value     {} 0 {} 0 
+  3 blobvalue {} 0 {} 0
+}
+
+do_execsql_test 1.1 {
+  INSERT INTO x1(blobkey, blobvalue) VALUES(x'abcd', x'1234');
+  SELECT quote(blobkey), quote(blobvalue) FROM x1;
+} {X'ABCD' X'1234'}
+
+do_catchsql_test 1.2 {
+  UPDATE x1 SET blobvalue = x'7890' WHERE blobkey = x'abcd';
+} {1 {cannot UPDATE}}
+
+do_catchsql_test 1.3 {
+  DELETE FROM x1 WHERE blobkey = x'abcd'
+} {1 {cannot DELETE}}
+
+do_test 1.4 {
+  lsort [glob testlsm.db*]
+} {testlsm.db testlsm.db-log testlsm.db-shm}
+
+db close
+do_test 1.5 {
+  lsort [glob testlsm.db*]
+} {testlsm.db}
+
+finish_test
+
+

Index: test/permutations.test
==================================================================
--- test/permutations.test
+++ test/permutations.test
@@ -87,11 +87,12 @@
 set alltests [list]
 foreach f [glob $testdir/*.test] { lappend alltests [file tail $f] }
 foreach f [glob -nocomplain       \
     $testdir/../ext/rtree/*.test  \
     $testdir/../ext/fts5/test/*.test   \
-] { 
+    $testdir/../ext/lsm1/test/*.test   \
+] {
   lappend alltests $f 
 }
 foreach f [glob -nocomplain $testdir/../ext/session/*.test] { 
   lappend alltests $f 
 }