anselme/test/tests/checkpoint merging mutable value.ans

:post run = "after error"

:l = [1,2]

1,2: {l}

~ l!insert(3)

1,2,3: {l}

:! a

~ l!insert(4)

1,2,3,4: {l}

:! b

~ l!insert(5)

1,2,3,4,5: {l}

~ error("cancel merge")

:$ after error
	1,2,3,4: {l}