Bug of reporting of macro expansion error.

[karpierz]

--- zope/pagetemplate/pagetemplate.py.org   2014-04-29 09:57:35.000000000 +0200
+++ zope/pagetemplate/pagetemplate.py   2014-04-29 11:38:05.251600000 +0200
@@ -193,7 +193,7 @@
                 return self.pt_render(context, source=1)
             except:
                 return (bs('%s\n Macro expansion failed\n %s\n-->\n' %
-                           (_error_start, "%s: %s" % sys.exc_info()[:2])) +
+                           (self._error_start, "%s: %s" % sys.exc_info()[:2])) +
                         self._text)

         return bs('%s\n %s\n-->\n' % (self._error_start,

[mgedmin]

Thank you for the bug report!

It would be awesome to have a failing test demonstrating the bug, to prevent regressions.

[mgedmin]

Looks like this bug was introduced in commit 8b38b26, where _error_start got moved from a module global to a class attribute.