[erlang-bugs] Re bug
Sat Mar 3 00:45:55 CET 2012
I have a pattern a?(n)a(n) where the (n) denotes repetition so a?(3)a(3) is shorthand for a?a?a?aaa. I will call this A(3). Then the pattern A(3) should match the string a(3). Which is does in re where I get (using my shorthand forms):
> re:run(a(3), A(3)). %re:run("aaa", "a?a?a?aaa").
It also works as expected for bigger n:
> re:run(a(15), A(15)).
all the way up to 22:
> re:run(a(22), A(22)).
but for 23 it fails:
> re:run(a(23), A(23)).
I don't see why it fails here as the pattern should match the string. Yes, I know this is a pathological case but I still don't think it should return nomatch. If it is giving up it should say so. Otherwise this is a bug.
More information about the erlang-bugs