wrap_facet: missing error path

diff --git a/isl_convex_hull.c b/isl_convex_hull.c
index 14b5817..c7ccd8f 100644 (file)
--- a/isl_convex_hull.c
+++ b/isl_convex_hull.c
@@ -441,6 +441,8 @@ static isl_int *wrap_facet(struct isl_ctx *ctx, struct isl_set *set,
        T = isl_mat_right_inverse(ctx, T);
        set = isl_set_preimage(ctx, set, T);
        T = NULL;
+       if (!set)
+               goto error;
        lp = wrap_constraints(ctx, set);
        obj = isl_vec_alloc(ctx, dim*set->n);
        if (!obj)