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-rw-r--r--src/segtree.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/segtree.c b/src/segtree.c
index 668c0857..f544704b 100644
--- a/src/segtree.c
+++ b/src/segtree.c
@@ -624,6 +624,7 @@ void interval_map_decompose(struct expr *set)
prefix_len = expr_value(i)->len - mpz_scan0(range, 0);
prefix = prefix_expr_alloc(&low->location, expr_value(low),
prefix_len);
+ prefix->len = low->len;
prefix = set_elem_expr_alloc(&low->location, prefix);
if (low->ops->type == EXPR_MAPPING)
prefix = mapping_expr_alloc(&low->location, prefix,