Ticket #31600: 31600-incr_decr_offset_type_check-2.diff

src/wp-includes/cache.php

@@ -467 +467 @@
                 if ( ! is_numeric( $this->cache[ $group ][ $key ] ) )
                         $this->cache[ $group ][ $key ] = 0;
 
-                $offset = (int) $offset;
+                $offset = is_numeric( $offset ) ? (int) $offset : 0;
 
                 $this->cache[ $group ][ $key ] -= $offset;
 
@@ -583 +583 @@
                 if ( ! is_numeric( $this->cache[ $group ][ $key ] ) )
                         $this->cache[ $group ][ $key ] = 0;
 
-                $offset = (int) $offset;
+                $offset = is_numeric( $offset ) ? (int) $offset : 0 ;
 
                 $this->cache[ $group ][ $key ] += $offset;