Transform both values of a task name into a byte str prior to comparing

Fixes #9571

lib/ansible/callbacks.py

@@ -603,11 +603,13 @@ class PlaybookCallbacks(object):
         call_callback_module('playbook_on_no_hosts_remaining')
 
     def on_task_start(self, name, is_conditional):
+        name = utils.to_bytes(name)
         msg = "TASK: [%s]" % name
         if is_conditional:
             msg = "NOTIFIED: [%s]" % name
 
         if hasattr(self, 'start_at'):
+            self.start_at = utils.to_bytes(self.start_at)
             if name == self.start_at or fnmatch.fnmatch(name, self.start_at):
                 # we found out match, we can get rid of this now
                 del self.start_at

lib/ansible/utils/__init__.py

@@ -1265,13 +1265,24 @@ def make_su_cmd(su_user, executable, cmd):
     )
     return ('/bin/sh -c ' + pipes.quote(sudocmd), None, success_key)
 
+# For v2, consider either using kitchen or copying my code from there for
+# to_unicode and to_bytes handling (TEK)
 _TO_UNICODE_TYPES = (unicode, type(None))
 
 def to_unicode(value):
+    # Use with caution -- this function is not encoding safe (non-utf-8 values
+    # will cause tracebacks if they contain bytes from 0x80-0xff inclusive)
     if isinstance(value, _TO_UNICODE_TYPES):
         return value
     return value.decode("utf-8")
 
+def to_bytes(value):
+    # Note: value is assumed to be a basestring to mirror to_unicode.  Better
+    # implementations (like kitchen.text.converters.to_bytes) bring that check
+    # into the function
+    if isinstance(value, str):
+        return value
+    return value.encode('utf-8')
 
 def get_diff(diff):
     # called by --diff usage in playbook and runner via callbacks