Index: src/build.c
==================================================================
--- src/build.c
+++ src/build.c
@@ -3220,10 +3220,12 @@
     int n;
     Index *pLoop;
     for(pLoop=pTab->pIndex, n=1; pLoop; pLoop=pLoop->pNext, n++){}
     zName = sqlite3MPrintf(db, "sqlite_autoindex_%s_%d", pTab->zName, n);
     if( zName==0 ){
+      if( db->mallocFailed==0 ) pParse->rc = SQLITE_TOOBIG;
+      pParse->nErr++;
       goto exit_create_index;
     }
 
     /* Automatic index names generated from within sqlite3_declare_vtab()
     ** must have names that are distinct from normal automatic index names.

Index: test/sqllimits1.test
==================================================================
--- test/sqllimits1.test
+++ test/sqllimits1.test
@@ -887,6 +887,16 @@
 
 
 foreach {key value} [array get saved] {
   catch {set $key $value}
 }
+
+#-------------------------------------------------------------------------
+# At one point the following caused an assert() to fail.
+#
+sqlite3_limit db SQLITE_LIMIT_LENGTH 10000
+set nm [string repeat x 10000]
+do_catchsql_test sqllimits1-17.1 "
+  CREATE TABLE $nm (x PRIMARY KEY)
+" {1 {string or blob too big}}
+
 finish_test