diff -r 0132221c25cd -r 876494fd967d mercurial/color.py
--- a/mercurial/color.py	Mon Sep 24 14:46:37 2018 -0700
+++ b/mercurial/color.py	Thu Jan 17 09:17:12 2019 -0800
@@ -169,7 +169,7 @@
             ui._terminfoparams[key[9:]] = newval
     try:
         curses.setupterm()
-    except curses.error as e:
+    except curses.error:
         ui._terminfoparams.clear()
         return