patch 9.1.1099: Vim9: import with extends may crash

Problem:  Vim9: import with extends may crash, v9.1.1087 wasn't the
          correct way to fix it)
Solution: When using an import class, Check for a valid class member
          variable at compile time (Yegappan Lakshmanan)

related: #16601
closes: #16603

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/Makefile b/src/testdir/Makefile
index 4c7a273..680d1a1 100644
--- a/src/testdir/Makefile
+++ b/src/testdir/Makefile
@@ -96,7 +96,7 @@
 	-rm -f opt_test.vim test_result.log $(CLEANUP_FILES)
 	-rm -rf $(RM_ON_RUN) $(RM_ON_START)
 	-rm -f valgrind.*
-	-rm -f asan.*
+	-rm -f asan.* asan_test_*
 	-rm -f guidialog guidialogfile
 
 # Delete the files produced by benchmarking, so they can run again.