expr1 | expr2 not working as expected

[geuben]

I am experiencing some oddities with using or expressions. I have replicated it with a trivial example:

import parsley

x = parsley.makeGrammar(
    """
    away_we_go = ('away we go' | 'off and running') -> "away_we_go"
    back_underway = ('back underway' | 'back under way') -> "back_underway"
    all = (anything*) -> "all"
    foo = away_we_go | back_underway | all
    """,
    {}
)

print x("giorenagoirhger").foo()            # all
print x("giorena goirhger").foo()           # all
print x("away we go").foo()                 # away_we_go
print x("back underway").foo()              # back_underway
print x("go").foo()                         # all
print x("lets go").foo()                    # all
print x("we are back under way go").foo()   # all
print x("we are back under way").foo()      # all
print x("back under way go").foo()          # ERROR

Traceback (most recent call last):
  File "process/tests/parsley_test.py", line 21, in <module>
    print x("back under way go").foo()          # ERROR
  File "/Users/reuben/.virtualenvs/processor/lib/python2.7/site-packages/parsley.py", line 98, in invokeRule
    raise err
ometa.runtime.ParseError:
back under way go
 ^
Parse error at line 1, column 1: expected EOF. trail: []

unless I am mistaken "back under way go" should fail to match the away_we_go pattern and the back_underway pattern and then match the all pattern.