cakephp/cakephp — comment on commit 176da154172c9d7670086ad4dc25733e03912bec
File: cake/libs/http_response.php line 198
By markstory:

That specific pattern causes two existing tests to fail, however `/^([0-9a-f]+) *(?:;(.+)=(.+))?(?:\r\n|\n)/iU` works with improper and proper line endings.