Warning: strrpos(): Offset is greater than the length of haystack string in libraries/cms/html/html.php on line 373
Call Stack
#   Time    Memory  Function    Location
1   0.0014  372104  {main}( )   .../index.php:0
2   0.1487  4188352 JApplicationCms->execute( ) .../index.php:51
3   0.5115  11004544    JApplicationAdministrator->render( )    .../cms.php:271
4   0.5116  11010216    JApplicationCms->render( )  .../administrator.php:429
5   0.5117  11010592    JDocumentHtml->parse( ) .../cms.php:1090
6   0.5117  11010592    JDocumentHtml->_fetchTemplate( )    .../html.php:457
7   0.5118  11010688    JDocumentHtml->_loadTemplate( ) .../html.php:642
8   0.5128  11054408    require( 'administrator/templates/hathor/cpanel.php' )  .../html.php:580
9   0.5191  11060560    JHtml::_( ) .../cpanel.php:68
10  0.5192  11061008    JHtml::call( )  .../html.php:105
11  0.5192  11061832    JHtml::stylesheet( )    .../html.php:233
12  0.5192  11062264    JHtml::includeRelativeFiles( )  .../html.php:630
13  0.5193  11062936    strrpos ( ) .../html.php:373| Labels | Added: 
? | ||
| Category | ⇒ | Templates (admin) | 
 
                 
                i don't have this warning
@mbabker are you using php 7.1?
Actually that issue is there for ever my PR only make it the see the light of day :)
The error is saying that 4 is actually bigger than the whole string.
https://github.com/joomla/joomla-cms/blob/staging/libraries/cms/html/html.php#L373
This is the case for ie8.css (ie8 = 3 characters) in hathor template
https://github.com/joomla/joomla-cms/blob/staging/administrator/templates/hathor/cpanel.php#L67
i think i solved it in #12780, but since i don't have the warning i can't confirm. please confirm @mbabker
 
                ok i was able to reproduce it. you need debug enabled and debug plugin enabled and go to control panel in hathor.
Anyway my PR fixes it.
| Status | New | ⇒ | Closed | 
| Closed_Date | 0000-00-00 00:00:00 | ⇒ | 2016-11-05 21:17:03 | 
| Closed_By | ⇒ | brianteeman | 
probably related to one of my PR. will check