isl_ast_build_init_derived: check build->domain

If something has gone wrong during the construction of the isl_ast_build,
its domain field may be NULL.  Since isl_ast_build_get_ctx obtains
the isl_ctx from this field, we should not continue if build->domain is NULL.

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

diff --git a/isl_ast_build.c b/isl_ast_build.c
index 26aabab..fbbb5c5 100644 (file)
--- a/isl_ast_build.c
+++ b/isl_ast_build.c
@@ -49,7 +49,7 @@ static __isl_give isl_ast_build *isl_ast_build_init_derived(
        isl_vec *strides;
 
        build = isl_ast_build_cow(build);
-       if (!build)
+       if (!build || !build->domain)
                goto error;
 
        ctx = isl_ast_build_get_ctx(build);