Description:
------------
It appears as though when a subcapture is contained within a repeating pattern, the value is overwritten by subsequent matches, leaving only the last captured value in the $matches array, rather than all matched values.

Test script:
---------------
preg_match(
  '/^([^<]+)(?:<([^>]+)>)*$/',
  'main<subkey><nothersub><onemore>',
  $keys
);
var_dump($keys);

Expected result:
----------------
array(
  'main<subkey><nothersub><onemore>',
  'main',
  'subkey',
  'nothersub',
  'onemore'
)

Actual result:
--------------
array(
  'main<subkey><nothersub><onemore>',
  'main',
  'onemore'
)