kohana/core — pull request #428 by JackEllis (2014-01-11 21:23:33+00:00)
Title: #4482 - Array to string conversion in deep Arr::merge

When using Arr::merge to merge arrays, the deeper array merges failed
and caused a ErrorException [ Notice ]: Array to string conversion

See: http://dev.kohanaframework.org/issues/4482