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tag length/2 as the source of finite_memory errors in list.pl (#1259)

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Mark Thom
2022-01-31 18:08:00 -07:00
parent 835345b89e
commit e62875ac90
1 changed files with 2 additions and 2 deletions
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4
src/lib/lists.pl
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@@ -54,9 +54,9 @@ length(Xs0, N) :-
'$skip_max_list'(M, N, Xs0,Xs),
!,
( Xs == [] -> N = M
; nonvar(Xs) -> var(N), throw(error(resource_error(finite_memory),_))
; nonvar(Xs) -> var(N), throw(error(resource_error(finite_memory),length/2))
; nonvar(N) -> R is N-M, length_rundown(Xs, R)
; N == Xs -> throw(error(resource_error(finite_memory),_))
; N == Xs -> throw(error(resource_error(finite_memory),length/2))
; length_addendum(Xs, N, M)
).
length(_, N) :-