Internal compiler error: 'index out of bounds'

[wackywendell]

When trying to compile this code, I get the following error:

$ rustc --lib "mdsim2.rs"
task 'rustc' failed at 'index out of bounds: the len is 26499407 but the index is 26499407', /build/rust-git/src/rust/src/libextra/ebml.rs:100
error: internal compiler error: unexpected failure
This message reflects a bug in the Rust compiler. 
We would appreciate a bug report: https://github.com/mozilla/rust/wiki/HOWTO-submit-a-Rust-bug-report
note: the compiler hit an unexpected failure path. this is a bug
note: try running with RUST_LOG=rustc=1 to get further details and report the results to github.com/mozilla/rust/issues
task '<main>' failed at 'explicit failure', /build/rust-git/src/rust/src/librustc/lib.rs:393
$ rustc -v
rustc 0.9-pre (f817ed3 2013-12-09 13:51:32 -0800)
host: x86_64-unknown-linux-gnu

Note that this requires nalgebra, which I had compiled just previously in my ~/.rust directory (different from the attached Gist file).

Also, I did try running with RUST_LOG=rustc=1, but I could see no difference; I'll file a separate bug report for that.

One more note: when I stripped this file down, the compiler error changed; it used to say task 'rustc' failed at 'lookup_item: id not found: 74888', /build/rust-git/src/rust/src/librustc/metadata/decoder.rs:91/

[alexcrichton]

This is likely because some dependencies were not rebuilt or have fallen out of date. If you recompile relevant dependencies, does this error go away?

[wackywendell]

Oh, you're right (sort of): rebuilding the library didn't do it, but I wasn't correctly adding the directory it was in.

Why isn't there an error saying something like "dependency not found"?

[alexcrichton]

An old version must have been found in some other system directory (possibly very far out of date). It looks like this bug is a dupe of #10207 in this case.

Thanks again for the bug report by the way!