test_name	system-change-crash
test_description Changing a system from one set of classes to another causes a crash during degree -1.

copy_sub 	Ace $TEST Ace
copy_raw 	test.e $CLUSTER test.e
copy_raw 	test1.e $CLUSTER test1.e
copy_raw 	test2.e $CLUSTER test2.e

compile_melted
compile_result 	ok

copy_raw 	test1_rev1.e $CLUSTER test1.e

compile_melted
compile_result 	ok

copy_raw 	test_rev2.e $CLUSTER test.e
copy_raw 	test1_rev2.e $CLUSTER test1.e
copy_raw 	test2_rev2.e $CLUSTER test2.e
copy_raw 	test3_rev2.e $CLUSTER test3.e

compile_melted
compile_result 	ok

test_end