From 20df3bd38bdba9845ef1136976606f9defe9c158 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 5 Jul 2013 17:02:25 +0200
Subject: [PATCH] isl_ast_expr_alloc_op: accept NULL pointer on zero-size
 allocation

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_ast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/isl_ast.c b/isl_ast.c
index 5885e413..a186fba2 100644
--- a/isl_ast.c
+++ b/isl_ast.c
@@ -343,7 +343,7 @@ __isl_give isl_ast_expr *isl_ast_expr_alloc_op(isl_ctx *ctx,
 	expr->u.op.n_arg = n_arg;
 	expr->u.op.args = isl_calloc_array(ctx, isl_ast_expr *, n_arg);
 
-	if (!expr->u.op.args)
+	if (n_arg && !expr->u.op.args)
 		return isl_ast_expr_free(expr);
 
 	return expr;
-- 
2.11.4.GIT