test 026 fails

tests/026.php fails every time.

It seems that the final callbacks are either never called or never waited for.

cat tests/026.log

---- EXPECTED OUTPUT
string(0) ""
string(5) "Array"
string(6) "prefix"
bool(true)
bool(true)
bool(true)
bool(true)
Array
(
    [foo] => dummy
    [bar] => dummy
)
Array
(
    [key] => foo
    [value] => dummy
)
Array
(
    [key] => bar
    [value] => dummy
)
---- ACTUAL OUTPUT
string(0) ""
string(5) "Array"
string(6) "prefix"
bool(true)
bool(true)
bool(true)
bool(true)
---- FAILED