From ebc1531ecc044ae5b51816506e458155ae44c5c4 Mon Sep 17 00:00:00 2001
From: buslov <buslov.artem@gmail.com>
Date: Mon, 30 Oct 2017 20:58:28 +0300
Subject: [PATCH] Fix V575 warning from PVS-Studio Static Analyzer

There might be dereferencing of a potential null pointer 'Node'.
---
 src/ast.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/ast.c b/src/ast.c
index 88ea491..23121ff 100644
--- a/src/ast.c
+++ b/src/ast.c
@@ -9,8 +9,10 @@
 
 ast* astCreate (astTag tag, tokenLocation location) {
     ast* Node = calloc(1, sizeof(ast));
-    Node->tag = tag;
-    Node->location = location;
+    if (Node) {
+        Node->tag = tag;
+        Node->location = location;
+    }
     return Node;
 }