Index: src/insert.c
==================================================================
--- src/insert.c
+++ src/insert.c
@@ -2273,11 +2273,15 @@
       if( xferCompatibleIndex(pDestIdx, pSrcIdx) ) break;
     }
     if( pSrcIdx==0 ){
       return 0;    /* pDestIdx has no corresponding index in pSrc */
     }
-    if( pSrcIdx->tnum==pDestIdx->tnum && pSrc->pSchema==pDest->pSchema ){
+    if( pSrcIdx->tnum==pDestIdx->tnum && pSrc->pSchema==pDest->pSchema
+         && sqlite3FaultSim(411)==SQLITE_OK ){
+      /* The sqlite3FaultSim() call allows this corruption test to be
+      ** bypassed during testing, in order to exercise other corruption tests
+      ** further downstream. */
       return 0;   /* Corrupt schema - two indexes on the same btree */
     }
   }
 #ifndef SQLITE_OMIT_CHECK
   if( pDest->pCheck && sqlite3ExprListCompare(pSrc->pCheck,pDest->pCheck,-1) ){