ICE in https://github.com/meddle0x53/mscheme/

[matthiaskrgr]

git clone https://github.com/meddle0x53/mscheme/ 
cd mscheme
git checkout 84dafecf41861185cba65f3cfea7c347f31241dd
RUST_BACKTRACE=Full cargo clippy

warning: you don't need to add `&` to all patterns
   --> src/interpreter/mod.rs:111:16
    |
111 |       let name = match node_at!(ast_nodes, 1) {
    |  ________________^
112 | |         &ASTNode::Identifier(ref x) => x,
113 | |         _ => runtime_error!("Bad variable name in 'define': {:?}", ast_nodes)
114 | |     };
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
thread 'rustc' panicked at 'byte index 38 is out of bounds of `    let mut result = empty!();`', src/libcore/str/mod.rs:2027:9
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
   1: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:70
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:58
             at src/libstd/panicking.rs:200
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:215
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:482
   6: std::panicking::continue_panic_fmt
             at src/libstd/panicking.rs:385
   7: rust_begin_unwind
             at src/libstd/panicking.rs:312
   8: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
   9: core::str::slice_error_fail
             at src/libcore/str/mod.rs:0
  10: core::str::traits::<impl core::slice::SliceIndex<str> for core::ops::range::RangeTo<usize>>::index::{{closure}}
  11: <core::iter::Map<I, F> as core::iter::iterator::Iterator>::fold
  12: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
  13: <rustc_errors::emitter::EmitterWriter as rustc_errors::emitter::Emitter>::emit
  14: rustc_errors::Handler::emit_db
  15: rustc_errors::diagnostic_builder::DiagnosticBuilder::emit
  16: clippy_lints::utils::span_lint_and_then
  17: <clippy_lints::matches::MatchPass as rustc::lint::LateLintPass<'a, 'tcx>>::check_expr
  18: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr
  19: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_local
  20: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_block
  21: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr
  22: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_body
  23: rustc::hir::intravisit::walk_fn
  24: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_fn
  25: rustc::hir::intravisit::walk_item
  26: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  27: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  28: rustc::hir::intravisit::walk_item
  29: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item
  30: <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod
  31: rustc::hir::intravisit::walk_crate
  32: rustc::lint::context::check_crate
  33: rustc::util::common::time
  34: <std::thread::local::LocalKey<T>>::with
  35: rustc::ty::context::TyCtxt::create_and_enter
  36: rustc_driver::driver::compile_input
  37: <scoped_tls::ScopedKey<T>>::set
  38: rustc_driver::run_compiler
  39: <scoped_tls::ScopedKey<T>>::set
query stack during panic:
end of query stack

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

note: rustc 1.33.0-nightly (bf669d1e3 2019-01-25) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental -C target-cpu=native --crate-type bin

note: some of the compiler flags provided by cargo are hidden

error: Could not compile `mscheme`.

To learn more, run the command again with --verbose.

clippy 0.0.212 (f175352 2019-01-24)