From 754681c365f733d33b1e1431d5d6c972fea4d832 Mon Sep 17 00:00:00 2001
From: Julien Palard <julien@palard.fr>
Date: Sat, 22 Dec 2018 23:20:07 +0100
Subject: [PATCH] FIX: KeyError: 'filename' in the f-function call.

---
 blurb/blurb.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/blurb/blurb.py b/blurb/blurb.py
index cd975ba..04448d7 100755
--- a/blurb/blurb.py
+++ b/blurb/blurb.py
@@ -483,6 +483,8 @@ def parse(self, text, *, metadata=None, filename="input"):
         line_number = None
 
         def throw(s):
+            nonlocal filename
+            nonlocal line_number
             raise BlurbError(f("Error in {filename}:{line_number}:\n{s}"))
 
         def finish_entry():