gentoo-overlay/dev-libs/isl/files/isl-0.22-bmap-nullderef.patch

https://groups.google.com/forum/#!original/isl-development/Otz1QKZDpzA/71GkTvqkCAAJ
https://bugs.gentoo.org/702968

Subject: [MAINT PATCH] isl_basic_map_underlying_set: fix error handling
Date: Tue,  7 Jan 2020 23:02:42 +0100
Message-Id: <20200107220242...@kotnet.org>
X-Mailer: git-send-email 2.24.1.591.g12029dc57d
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From: Sven Verdoolaege <sven.ve...@gmail.com>

The check for a valid bmap before accessing its n_div field
was inadvertently removed in isl-0.21-230-g6a4c4bbf31 (isl_map.c:
extract out shared isl_basic_map_{take,restore}_space,
Thu Aug 11 10:27:49 2016 +0200).

Reported-by: Richard Biener <rgue...@suse.de>
Signed-off-by: Sven Verdoolaege <sven.ve...@gmail.com>
---
 isl_map.c | 2 ++
 1 file changed, 2 insertions(+)
--- a/isl_map.c
+++ b/isl_map.c
@@ -5511,6 +5511,8 @@ __isl_give isl_basic_set *isl_basic_map_underlying_set(
 	    !isl_space_is_named_or_nested(bmap->dim, isl_dim_out))
 		return bset_from_bmap(bmap);
 	bmap = isl_basic_map_cow(bmap);
+	if (!bmap)
+		return NULL;
 	space = isl_basic_map_take_space(bmap);
 	space = isl_space_underlying(space, bmap->n_div);
 	bmap = isl_basic_map_restore_space(bmap, space);
-- 
2.24.1.591.g12029dc57d