Uncovered by the compound_expr_remove() replacement by type safe function
coming after this patch.

Add expression to the concatenation which is reachable via expr_value().

This bug is subtle, I could not spot any reproducible buggy behaviour
when using the wrong type when running the existing tests.

Fixes: 8ac2f3b2fca3 ("src: Add support for concatenated set ranges")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/segtree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/segtree.c b/src/segtree.c
index 70b4416cf39b..fd77e03fbff5 100644
--- a/src/segtree.c
+++ b/src/segtree.c
@@ -448,7 +448,7 @@ next:
 			mpz_clear(range);
 
 			r2 = list_entry(r2_next, typeof(*r2), list);
-			compound_expr_remove(start, r1);
+			compound_expr_remove(expr_value(start), r1);
 
 			if (free_r1)
 				expr_free(r1);
-- 
2.30.2