The suggested and tested fix was added with https://gerrit.wikimedia.org/r/#/c/284476/ Use REL1_27 for best experience.
Upon saving a page that assignes a value to the property Assigned to:: the follwing error is displayed.
Fatal error: Call to a member function getEmail() on a non-object in .../extensions/SemanticTasks/SemanticTasks.classes.php on line 293
Only when I deactivate the extension I can save the page.
I think this issue is more related with mail configuration and not to the extension.
I'm getting the same error. Also when I save something. It also goes away if I remove the extension.
Please try the following change in that file, at around line 179:
$assignee_name = $task_assignees->getNextText( SMW_OUTPUT_WIKI );
/** @todo Create User object */
$assignee_name = explode( ":", $assignee_name );
+
+ if ( !isset( $assignee_name[1] ) ) {
+ return array();
+ }
$assignee_name = $assignee_name[1];