Setup.php lines 434-438:
// Easy to forget to falsify $wgDebugToolbar for static caches.
// If file cache or CDN cache is on, just disable this (DWIMD).
if ( $wgUseFileCache || $wgUseSquid ) {
$wgDebugToolbar = false;
}
Change-Id: I911e8655026860823d6d869579d38a37157a448a
/**
* Display the new debugging toolbar. This also enables profiling on database
* queries and other useful output.
- * Will disable file cache.
+ * Will be ignored if $wgUseFileCache or $wgUseSquid is enabled.
*
* @since 1.19
*/