Internal compiler error: index out of bounds

[milibopp]

I tried to update a library to the most recent Rust, but ran into this issue. Basically I get this error:

error: internal compiler error: unexpected failure
This message reflects a bug in the Rust compiler. 
We would appreciate a bug report: http://static.rust-lang.org/doc/master/complement-bugreport.html
note: the compiler hit an unexpected failure path. this is a bug
Ok(task 'rustc' failed at 'index out of bounds: the len is 0 but the index is 0', /build/rust-git/src/rust/src/librustc/lib.rs:1
)

I have no idea though, what in the codebase causes this. Version info:

rustc 0.10-pre (0e95b08 2014-03-06 15:11:42 -0800)
host: x86_64-unknown-linux-gnu

[jeremyletang]

I get the same error yesterday and and the problem was the unused unnamed parameters in a trait with default methods.
I haven't open an issue because of #8417, but i've just see that this issue is closed.
Maybe your issue is the same?

[sebcrozet]

I have just given a name to each unnamed parameter, and it compiles fine now.
So it seems this bug is very similar to #8417 alright, but the original example given by @pnkfelix does compile without ICE!

[pnkfelix]

I do not see a concrete test case. Can you please provide one, preferably a minimal one?

[alexcrichton]

Closing as a likely dupe of #13775. If it's different though, feel free to reopen!