'unexpected sort of node' when generating debug info

[jesse99]

Trying to build a fork of rust-socket with rust from June 30, 2012 I get the following:

rustc socket.rc -g
error: internal compiler error: create_function: unexpected sort of node
rust: task failed at 'explicit failure', /Users/jessejones/Source/Third_Party/rust/src/libsyntax/diagnostic.rs:78
rust: task failed at 'explicit failure', /Users/jessejones/Source/Third_Party/rust/src/rustc/driver/rustc.rs:258
rust: domain main @0x7f91c1000010 root task failed
rust: task failed at 'killed', /Users/jessejones/Source/Third_Party/rust/src/libcore/task.rs:461
make: *** [all] Error 101

To repro this do the following from a terminal:

git clone https://github.com/jesse99/rust-socket.git
git checkout c23984460cf948d9b8a8f8153db7883ce45ac4e7
make

[jesse99]

Narrowed it down to the finalizer in:

class socket_handle {
    let sockfd: libc::c_int;
    new(x: libc::c_int) {self.sockfd = x;}
    drop {c::close(self.sockfd);}
}

[brson]

I can successfully build the above test case with ba6f71f on 64-bit linux

[jesse99]

Here is a simple repro:

class socket_handle {
    let sockfd: int;
    new(x: int) {self.sockfd = x;}
    drop {io::println("hmm");}
}

Finally figured out that it works when -g is not used.

[brson]

Updated the title to reflect the debuginfo problem.

[catamorphism]

Dup of #2194