From 5bac84374b267e9a096b1d1baf39a03f210cee6e Mon Sep 17 00:00:00 2001
From: Simon Cozens <simon@simon-cozens.org>
Date: Mon, 15 Mar 2021 12:50:07 +0000
Subject: [PATCH] Ensure TTF list is correct

---
 Lib/fontTools/varLib/merger.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/fontTools/varLib/merger.py b/Lib/fontTools/varLib/merger.py
index 0ea6c2cf6..6b0416b29 100644
--- a/Lib/fontTools/varLib/merger.py
+++ b/Lib/fontTools/varLib/merger.py
@@ -120,10 +120,10 @@ class Merger(object):
 					"got": lst},))
 
 	def mergeTables(self, font, master_ttfs, tableTags):
-		self.ttfs = master_ttfs  # For error reporting
 		for tag in tableTags:
 			if tag not in font: continue
 			try:
+				self.ttfs = [m for m in master_ttfs if tag in m]
 				self.mergeThings(font[tag], [m[tag] if tag in m else None
 							     for m in master_ttfs])
 			except Exception as e: