Index: src/parse.y
==================================================================
--- src/parse.y
+++ src/parse.y
@@ -167,12 +167,17 @@
 temp(A) ::= .      {A = 0;}
 create_table_args ::= LP columnlist conslist_opt(X) RP(E) table_options(F). {
   sqlite3EndTable(pParse,&X,&E,F,0);
 }
 create_table_args ::= AS select(S). {
-  sqlite3EndTable(pParse,0,0,0,S);
-  sqlite3SelectDelete(pParse->db, S);
+  if( pParse->db->init.busy==0 ){
+    sqlite3EndTable(pParse,0,0,0,S);
+    sqlite3SelectDelete(pParse->db, S);
+  }else{
+    sqlite3SelectDelete(pParse->db, S);
+    sqlite3ErrorMsg(pParse, "corrupt schema");
+  }
 }
 %type table_options {int}
 table_options(A) ::= .    {A = 0;}
 table_options(A) ::= WITHOUT nm(X). {
   if( X.n==5 && sqlite3_strnicmp(X.z,"rowid",5)==0 ){