# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 2019-11-21 20:39:03
# Node ID 882e633ac92cf73b2fcf9f6cf8d058d300d80908
# Parent  6c8ba31405d9bdbe2d7b7b93ce712c297616ad1a

profiling: add a missing argument to the ProgrammingError constructor

Differential Revision: https://phab.mercurial-scm.org/D7470

diff --git a/mercurial/profiling.py b/mercurial/profiling.py
--- a/mercurial/profiling.py
+++ b/mercurial/profiling.py
@@ -204,7 +204,7 @@ class profile(object):
 
         If the profiler was already started, this has no effect."""
         if not self._entered:
-            raise error.ProgrammingError()
+            raise error.ProgrammingError(b'use a context manager to start')
         if self._started:
             return
         self._started = True