問題一

1. bug1

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   Invalid component used in plugin/component_callback():mod_
   

2. answer1

   commit 6a3984fe0f94914cb4c3a1e6f809d520341a6797
   Author: Chris Wharton <chrisw@catalyst.net.nz>
   Date:   Fri Aug 3 13:38:23 2012 +1200
   
       comment/locallib.php: Fix broken comments report
       
       WR96765: Workaround for issue MDL-31010
       Signed-off-by: Chris Wharton <chrisw@catalyst.net.nz>
   
   diff --git a/comment/locallib.php b/comment/locallib.php
   index fd62b61..079bf00 100644
   --- a/comment/locallib.php
   +++ b/comment/locallib.php
   @@ -127,6 +127,10 @@ class comment_manager {
                    $this->cm = get_coursemodule_from_id(”, $this->context->instanceid);
                    $this->setup_course($this->cm->course);
                    $this->modinfo = get_fast_modinfo($this->course);
   +                if (!isset($this->modinfo->cms[$this->cm->id]->modname)) {
   +                    $this->pluginname = $this->cm->modname;
   +                    break;
   +                }
                    $this->pluginname = $this->modinfo->cms[$this->cm->id]->modname;
                    break;
            }