Index: src/malloc.c
==================================================================
--- src/malloc.c
+++ src/malloc.c
@@ -160,10 +160,11 @@
 
 /*
 ** Initialize the memory allocation subsystem.
 */
 int sqlite3MallocInit(void){
+  int rc;
   if( sqlite3GlobalConfig.m.xMalloc==0 ){
     sqlite3MemSetDefault();
   }
   memset(&mem0, 0, sizeof(mem0));
   if( sqlite3GlobalConfig.bCoreMutex ){
@@ -195,11 +196,13 @@
       || sqlite3GlobalConfig.nPage<1 ){
     sqlite3GlobalConfig.pPage = 0;
     sqlite3GlobalConfig.szPage = 0;
     sqlite3GlobalConfig.nPage = 0;
   }
-  return sqlite3GlobalConfig.m.xInit(sqlite3GlobalConfig.m.pAppData);
+  rc = sqlite3GlobalConfig.m.xInit(sqlite3GlobalConfig.m.pAppData);
+  if( rc!=SQLITE_OK ) memset(&mem0, 0, sizeof(mem0));
+  return rc;
 }
 
 /*
 ** Return true if the heap is currently under memory pressure - in other
 ** words if the amount of heap used is close to the limit set by