126a127,129
> 
>             $context = get_context_instance(CONTEXT_MODULE, $cm->id);
> 
128c131
<             if (has_capability('mod/forum:viewdiscussion', $cm)) {
---
>             if (has_capability('mod/forum:viewdiscussion', $context)) {
132c135
<                 !has_capability('mod/forum:managesubscriptions', $cm)) 
---
>                 !has_capability('mod/forum:managesubscriptions', $context))