Index: src/vdbeblob.c
==================================================================
--- src/vdbeblob.c
+++ src/vdbeblob.c
@@ -75,11 +75,13 @@
   }else{
     rc = sqlite3_step(p->pStmt);
   }
   if( rc==SQLITE_ROW ){
     VdbeCursor *pC = v->apCsr[0];
-    u32 type = pC->aType[p->iCol];
+    u32 type = pC->nHdrParsed>p->iCol ? pC->aType[p->iCol] : 0;
+    testcase( pC->nHdrParsed==p->iCol );
+    testcase( pC->nHdrParsed==p->iCol+1 );
     if( type<12 ){
       zErr = sqlite3MPrintf(p->db, "cannot open value of type %s",
           type==0?"null": type==7?"real": "integer"
       );
       rc = SQLITE_ERROR;