Method calls don't work on ADT enums

[Manishearth]

Method and function calls on ADT enums seem to be broken, they cause a segfault. C-like enums work fine. Not sure what's going on here

[tromey]

I found a buglet here where rust_last_path_segment can return 0x1 when there isn't an apparent path segment. I'm still not sure what is going on here though.

A simple test is to break in the new take_value method in methods.rs, then finish. This will print garbage now (used to crash). Uncommenting the new test in methods.exp shows how whatever this is can cause an inferior crash as well.

Maybe this is the return value bug that Josh mentioned. Not sure without looking deeper though.