From 8986937340d43fa965fe02fd997522b031636f01 Mon Sep 17 00:00:00 2001
From: mappu <mappu04@gmail.com>
Date: Fri, 10 Apr 2020 16:20:38 +1200
Subject: [PATCH] node/error: handle the case where no position is available
 for inner node

---
 node.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/node.go b/node.go
index 87fc239..cf95856 100644
--- a/node.go
+++ b/node.go
@@ -26,7 +26,12 @@ type parseErr struct {
 }
 
 func (pe parseErr) Error() string {
-	return fmt.Sprintf("Parsing %s on line %d: %s", nodeTypeString(pe.n), pe.n.GetPosition().StartLine, pe.childErr)
+	positionStr := ""
+	if posn := pe.n.GetPosition(); posn != nil {
+		positionStr = fmt.Sprintf(" on line %d", posn.StartLine)
+	}
+
+	return fmt.Sprintf("Parsing %s%s: %s", nodeTypeString(pe.n), positionStr, pe.childErr.Error())
 }
 
 func (pe parseErr) Unwrap() error {