[Mesa-dev] [PATCH 07/20] glsl: Add null check in loop_analysis.cpp

[Juha-Pekka Heikkila]

Check return value from hash_table_find before using it as a pointer

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
---
 src/glsl/loop_analysis.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/glsl/loop_analysis.cpp b/src/glsl/loop_analysis.cpp
index d6a9ac7..78ac300 100644
--- a/src/glsl/loop_analysis.cpp
+++ b/src/glsl/loop_analysis.cpp
@@ -589,8 +589,10 @@ get_basic_induction_increment(ir_assignment *ir, hash_table *var_hash)
 	 loop_variable *lv =
 	    (loop_variable *) hash_table_find(var_hash, inc_var);
 
-	 if (!lv->is_loop_constant())
-	    inc = NULL;
+         if (lv == NULL || !lv->is_loop_constant()) {
+            assert(lv != NULL);
+            inc = NULL;
+         }
       } else
 	 inc = NULL;
    }
-- 
1.8.1.2