Merge pull request #2169 from takeru/load_crash

goto STOP if ridx==0

src/vm.c

@@ -1408,6 +1408,7 @@ RETRY_TRY_BLOCK:
           }
         }
       L_RESCUE:
+        if (ci->ridx == 0) goto L_STOP;
         proc = ci->proc;
         irep = proc->body.irep;
         pool = irep->pool;