isl_pw_qpolynomial_fold_bound: avoid access to freed memory

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_bound.c b/isl_bound.c
index c67fcbf..9783604 100644 (file)
--- a/isl_bound.c
+++ b/isl_bound.c
@@ -233,10 +233,11 @@ __isl_give isl_pw_qpolynomial_fold *isl_pw_qpolynomial_fold_bound(
        }
 
        if (isl_pw_qpolynomial_fold_is_zero(pwf)) {
+               enum isl_fold type = pwf->type;
                isl_pw_qpolynomial_fold_free(pwf);
                if (tight)
                        *tight = 1;
-               return isl_pw_qpolynomial_fold_zero(dim, pwf->type);
+               return isl_pw_qpolynomial_fold_zero(dim, type);
        }
 
        bound.pwf = isl_pw_qpolynomial_fold_zero(isl_dim_copy(dim), pwf->type);