lpeg-list match time capture discrepancy

[Wesley Smith <wesley.hoke@...>]

There seems to be a discrepancy with match-time captures in lpeg-list
as compared to lpeg itself.  Switching between strings and lists
creates errors saying "invalid position returned by match-time
capture".


local code = "ab"
--local code = {"a", "b"}

local patt = m.L"a" * m.Cmt(
			m.L"b",
			function(s, i)
				return i
			end
		)

print(patt:match(code))


I would think that any match-time capture returning the index passed
in to it's second argument (function) would not produce an error, but
when the stream being matched is a list, it causes an error if the
match position is the last element in the  list.  Am I
misunderstanding match-time lists or is this a bug?

thanks,
wes