mercurial/crecord.py

--- a/mercurial/crecord.py	Thu Jan 04 12:12:07 2018 +0100
+++ b/mercurial/crecord.py	Thu Jan 04 12:34:40 2018 +0100
@@ -1719,7 +1719,10 @@
         self.yscreensize, self.xscreensize = self.stdscr.getmaxyx()
 
         curses.start_color()
-        curses.use_default_colors()
+        try:
+            curses.use_default_colors()
+        except curses.error:
+            self.usecolor = False
 
         # available colors: black, blue, cyan, green, magenta, white, yellow
         # init_pair(color_id, foreground_color, background_color)