# HG changeset patch
# User Ian Moody <moz-ian@perix.co.uk>
# Date 2019-10-11 17:08:50
# Node ID 8c0fe77f47c5956681238b79dc15093c92e79395
# Parent  733d4ffcd6675d457b60bafa9568115daebc0661

convert: convert os.devnull to bytes before trying to join it with other bytes

Together with the previous commit relating to emailparser this gets
test-convert-tla.t passing under py3.

Differential Revision: https://phab.mercurial-scm.org/D7062

diff --git a/hgext/convert/gnuarch.py b/hgext/convert/gnuarch.py
--- a/hgext/convert/gnuarch.py
+++ b/hgext/convert/gnuarch.py
@@ -216,7 +216,8 @@ class gnuarch_source(common.converter_so
         cmdline = [self.execmd, cmd]
         cmdline += args
         cmdline = [procutil.shellquote(arg) for arg in cmdline]
-        cmdline += [b'>', os.devnull, b'2>', os.devnull]
+        bdevnull = pycompat.bytestr(os.devnull)
+        cmdline += [b'>', bdevnull, b'2>', bdevnull]
         cmdline = procutil.quotecommand(b' '.join(cmdline))
         self.ui.debug(cmdline, b'\n')
         return os.system(pycompat.rapply(procutil.tonativestr, cmdline))