Building https://is.gd/qud5dG with nightly 10-07 and 10-20 crashes with the following message: > error: internal compiler error: unexpected panic > > note: the compiler unexpectedly panicked. this is a bug. > > note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports > > thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 78', ../src/libcollections/vec.rs:1306