[PATCH STABLE] fileset: suppress EACCES while reading arbitrary paths via filectx API

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1532849151 -32400
#      Sun Jul 29 16:25:51 2018 +0900
# Branch stable
# Node ID 7d91a50276dfe66c6e85892934403b6e803e548f
# Parent  39885c84a7c1fa65637d281188c51de06d9c0997
fileset: suppress EACCES while reading arbitrary paths via filectx API

On Windows, EACCES is raised in place of EISDIR. This patch simply adds
EACCES to the list of errors to be ignored since I think it's okay for
filesets to treat inaccessible working-copy files as not existing.

diff --git a/mercurial/fileset.py b/mercurial/fileset.py
--- a/mercurial/fileset.py
+++ b/mercurial/fileset.py
@@ -592,7 +592,9 @@ class matchctx(object):
                 try:
                     return predfn(fctx)
                 except (IOError, OSError) as e:
-                    if e.errno in (errno.ENOENT, errno.ENOTDIR, errno.EISDIR):
+                    # open()-ing a directory fails with EACCES on Windows
+                    if e.errno in (errno.ENOENT, errno.EACCES, errno.ENOTDIR,
+                                   errno.EISDIR):
                         return False
                     raise
         else: