Tales Expression breakage in lates Zope 2.12.26 and 2.13.

[Andreas Elvers]

The following Tales expression used to compile under Zope 2.12.20 and also on earlier version of 2.13.

Enter this in ZMI into a page template:

  <span tal:replace="string:${options/blah|string:foo}"></span>

With 2.12.26 and 2.13.19 an error is thrown upon saving.

Compilation failed
zope.tal.taldefs.TALError: $ must be doubled or followed by a simple path in expression u'string:${options/blah|string:foo}', at line 8, column 3

[Andreas Elvers (itsafire1)]

The current workaround is to write something like this:

<span tal:condition="exists:options/blah" tal:replace="string:${options/blah}"></span>
<span tal:condition="not:exists:options/blah" tal:replace="string:foo"></span>

[Hanno Schlichting (hannosch)]

This is the result of a bugfix (https://bugs.launchpad.net/zope.tales/+bug/1002242) and the former behavior was deemed to violate the specification. You have to change your templates.