# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2017-03-11 18:53:14
# Node ID 295625f1296bda9c507b9025177c4f2452408cc3
# Parent  0c8a042b193d9f19a1ba161a861f2647ae8eb80a
# Parent  86cd1f2cfff5d5f5ebda227b147ad71a59058323

merge with stable

diff --git a/mercurial/pycompat.py b/mercurial/pycompat.py
--- a/mercurial/pycompat.py
+++ b/mercurial/pycompat.py
@@ -69,7 +69,8 @@ if ispy3:
     #
     # TODO: On Windows, the native argv is wchar_t, so we'll need a different
     # workaround to simulate the Python 2 (i.e. ANSI Win32 API) behavior.
-    sysargv = list(map(os.fsencode, sys.argv))
+    if getattr(sys, 'argv', None) is not None:
+        sysargv = list(map(os.fsencode, sys.argv))
 
     def bytechr(i):
         return bytes([i])
@@ -173,7 +174,8 @@ else:
     stdin = sys.stdin
     stdout = sys.stdout
     stderr = sys.stderr
-    sysargv = sys.argv
+    if getattr(sys, 'argv', None) is not None:
+        sysargv = sys.argv
     sysplatform = sys.platform
     getcwd = os.getcwd
     sysexecutable = sys.executable