isl_basic_map_foreach_lexopt: avoid invalid access on error

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

diff --git a/isl_tab_pip.c b/isl_tab_pip.c
index f69bae3..9663979 100644 (file)
--- a/isl_tab_pip.c
+++ b/isl_tab_pip.c
@@ -4784,11 +4784,13 @@ int isl_basic_map_foreach_lexopt(__isl_keep isl_basic_map *bmap, int max,
        struct isl_sol_for *sol_for = NULL;
 
        bmap = isl_basic_map_copy(bmap);
+       bmap = isl_basic_map_detect_equalities(bmap);
        if (!bmap)
                return -1;
 
-       bmap = isl_basic_map_detect_equalities(bmap);
        sol_for = sol_for_init(bmap, max, fn, user);
+       if (!sol_for)
+               goto error;
 
        if (isl_basic_map_plain_is_empty(bmap))
                /* nothing */;