diff --git a/hgext/fix.py b/hgext/fix.py
--- a/hgext/fix.py
+++ b/hgext/fix.py
@@ -698,6 +698,9 @@ def fixfile(ui, repo, opts, fixers, fixc
             command = fixer.command(ui, path, ranges)
             if command is None:
                 continue
+            msg = b'fixing: %s - %s - %s\n'
+            msg %= (fixctx, fixername, path)
+            ui.debug(msg)
             ui.debug(b'subprocess: %s\n' % (command,))
             proc = subprocess.Popen(
                 procutil.tonativestr(command),
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -7500,6 +7500,9 @@ def tag(ui, repo, name1, *names, **opts)
                 )
         node = logcmdutil.revsingle(repo, rev_).node()
 
+        if node is None:
+            raise error.InputError(_(b"cannot tag working directory"))
+
         if not message:
             # we don't translate commit messages
             message = b'Added tag %s for changeset %s' % (
diff --git a/mercurial/hgweb/server.py b/mercurial/hgweb/server.py
--- a/mercurial/hgweb/server.py
+++ b/mercurial/hgweb/server.py
@@ -206,7 +206,7 @@ class _httprequesthandler(httpservermod.
         env['SERVER_PROTOCOL'] = self.request_version
         env['wsgi.version'] = (1, 0)
         env['wsgi.url_scheme'] = pycompat.sysstr(self.url_scheme)
-        if env.get('HTTP_EXPECT', b'').lower() == b'100-continue':
+        if env.get('HTTP_EXPECT', '').lower() == '100-continue':
             self.rfile = common.continuereader(self.rfile, self.wfile.write)
 
         env['wsgi.input'] = self.rfile
diff --git a/tests/test-fix.t b/tests/test-fix.t
--- a/tests/test-fix.t
+++ b/tests/test-fix.t
@@ -1153,6 +1153,7 @@ useful for anyone trying to set up a new
   $ hg commit -Aqm "foo"
   $ printf "Foo\nbar\nBaz\n" > foo.changed
   $ hg --debug fix --working-dir
+  fixing: f65cf3136d41+ - uppercase-changed-lines - foo.changed
   subprocess: * $TESTTMP/uppercase.py 1-1 3-3 (glob)
 
   $ cd ..
diff --git a/tests/test-remotefilelog-local.t b/tests/test-remotefilelog-local.t
--- a/tests/test-remotefilelog-local.t
+++ b/tests/test-remotefilelog-local.t
@@ -77,6 +77,11 @@
   n 644          2 * z (glob)
   $ echo xxxx > x
   $ echo yyyy > y
+# run status early to avoid a flaky second fetch during commit.
+  $ hg st
+  M x
+  M y
+  \d+ files fetched over \d+ fetches .* (re) (?)
   $ hg commit -m x
   created new head
   2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
@@ -104,6 +109,9 @@
   new changesets fed61014d323
   (run 'hg heads' to see heads, 'hg merge' to merge)
 
+# run status early to avoid a flaky second fetch during commit
+  $ hg status
+  \d+ files fetched over \d+ fetches .* (re) (?)
   $ hg rebase -d tip
   rebasing 1:9abfe7bca547 "a"
   saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/9abfe7bca547-8b11e5ff-rebase.hg (glob)
diff --git a/tests/test-tag.t b/tests/test-tag.t
--- a/tests/test-tag.t
+++ b/tests/test-tag.t
@@ -412,6 +412,10 @@ tagging on null rev
   abort: cannot tag null revision
   [10]
 
+  $ hg tag -R empty -r "wdir()" -f wdirtag
+  abort: cannot tag working directory
+  [10]
+
 issue5539: pruned tags do not appear in .hgtags
 
   $ cat >> $HGRCPATH << EOF