Index: tests/linearization.test
===================================================================
diff -u -r275da34d3d7a874a451eced58242b738c8a37d1a -ra963e8896fd07c345ccfa034cbd043344edbf083
--- tests/linearization.test	(.../linearization.test)	(revision 275da34d3d7a874a451eced58242b738c8a37d1a)
+++ tests/linearization.test	(.../linearization.test)	(revision a963e8896fd07c345ccfa034cbd043344edbf083)
@@ -81,7 +81,7 @@
   #
   # Boat example DHHM 94; 
   # R. Ducournau, M. Habib, M. Huchard, and M.L. Mugnier. Proposal for a Monotonic Multiple Inheritance Linearization.
-  # see: http://www2.lirmm.fr/~ducour/Publis/DHHM-oopsla94.pdf
+  # see: https://www2.lirmm.fr/~ducour/Publis/DHHM-oopsla94.pdf
   #
 
   nx::Class create boat ;# 8
@@ -126,9 +126,32 @@
 
 }
 
+nx::test case boat-crash {
+  #
+  # This variant of the boat test case lead to problems in earlier
+  # versions depending on the deletion order during the cleanup in the
+  # test case.
+  #
+  nx::Class create boat ;# 8
+  nx::Class create dayboat -superclass boat ;# 6
+  nx::Class create wheelboat -superclass boat ;# 7
+  nx::Class create engineless -superclass dayboat ;# 3
+  nx::Class create pedalwheelboat -superclass {engineless wheelboat} ;# 2
+  nx::Class create smallmultihull -superclass dayboat ;# 5
+  nx::Class create smallcatamaran -superclass smallmultihull ;# 4
+  nx::Class create pedalo -superclass {pedalwheelboat smallcatamaran};# 1
+
+  ? {::smallcatamaran destroy} ""
+  ? {::boat destroy} ""
+  ? {::pedalo info heritage} {::pedalwheelboat ::engineless ::dayboat ::wheelboat ::nx::Object}
+  ? {::pedalo destroy} ""
+  ? {::pedalwheelboat info heritage} {::engineless ::dayboat ::wheelboat ::nx::Object}
+}
+
+
 #
 # Local variables:
 #    mode: tcl
 #    tcl-indent-level: 2
 #    indent-tabs-mode: nil
-# End:
\ No newline at end of file
+# End: