ICE with `RUST_LOG=rustc_trans::trans::expr`

[klutzy]

fn main() {
    // reduced from: println!("{}", 1u8);
    ::std::fmt::argument(::std::fmt::String::fmt, &1u8);
}

With RUST_BACKTRACE=1 RUST_LOG=rustc_trans::trans::expr:

error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'index out of bounds: the len is 1067 but the index is 1508', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libsyntax/lib.rs:1

stack backtrace:
   1:     0x7fdb9620c850 - sys::backtrace::write::h5b05e7b061a35107Czt
   2:     0x7fdb9622ea60 - failure::on_fail::h1e9b7e3de59488d1aPz
   3:     0x7fdb9619c5e0 - rt::unwind::begin_unwind_inner::h23dcfb4c37870bd62tz
   4:     0x7fdb9619cfb0 - rt::unwind::begin_unwind_fmt::h05159510ccba4efbzsz
   5:     0x7fdb9622e8b0 - rust_begin_unwind
   6:     0x7fdb96276440 - panicking::panic_fmt::h9b349a297a4abc9dpfl
   7:     0x7fdb9627c980 - panicking::panic_bounds_check::h9fec296806c0b151qel
   8:     0x7fdb90f12290 - util::interner::StrInterner::get::h517bd7e9f49d3424cqa
   9:     0x7fdb945d2260 - util::ppaux::ty..BoundRegion.Repr<'tcx>::repr::h547eedc9d0571450qTw
  10:     0x7fdb94624190 - util::ppaux::ty..FreeRegion.Repr<'tcx>::repr::hd97356ceb5d2c4d4w0w
  11:     0x7fdb94575c70 - util::ppaux::ty..Region.Repr<'tcx>::repr::hb5779d99cb9e40c1JVw
  12:     0x7fdb947226c0 - middle::ty::AutoRef<'tcx>.Repr<'tcx>::repr::h10edcd176ff43c3anva
  13:     0x7fdb947221a0 - middle::ty::AutoDerefRef<'tcx>.Repr<'tcx>::repr::h742bf848b6e16df0jua
  14:     0x7fdb947220a0 - middle::ty::AutoAdjustment<'tcx>.Repr<'tcx>::repr::h79ff9a93cf9bff71Kqa
  15:     0x7fdb951cf860 - trans::expr::trans::h01fbaf4f85983040eCh
  16:     0x7fdb951e0910 - trans::callee::trans_args::h2be3d88764ab50cexch
  17:     0x7fdb952122f0 - trans::callee::trans_call_inner::h8685402877239769531
  18:     0x7fdb95217d10 - trans::expr::trans_rvalue_dps_unadjusted::hadddfbae4195cb641Si
  19:     0x7fdb951ce5f0 - trans::expr::trans_into::ha60adcbe08fa3bdbKyh
  20:     0x7fdb951cec40 - trans::controlflow::trans_block::hdd6a1a94b7524b90B3d
  21:     0x7fdb9529ac70 - trans::base::trans_closure::h1947fd5123bfe895EYt
  22:     0x7fdb951b9b10 - trans::base::trans_fn::h5d061f11fc4ac1e7j9t
  23:     0x7fdb951b9f70 - trans::monomorphize::monomorphic_fn::h0873600250edcc42Fpd
  24:     0x7fdb9520c850 - trans::callee::trans_fn_ref_with_substs::ha1eefbe6087d2373Gxg
  25:     0x7fdb9520adf0 - trans::callee::trans_fn_ref::he04357177a921f96Rlg
  26:     0x7fdb952080d0 - trans::callee::trans::h36851c362b65c790yag
  27:     0x7fdb952122f0 - trans::callee::trans_call_inner::h8685402877239769531
  28:     0x7fdb95217d10 - trans::expr::trans_rvalue_dps_unadjusted::hadddfbae4195cb641Si
  29:     0x7fdb951ce5f0 - trans::expr::trans_into::ha60adcbe08fa3bdbKyh
  30:     0x7fdb951cd9b0 - trans::controlflow::trans_stmt_semi::hce06ed398066bc74K2d
  31:     0x7fdb951cec40 - trans::controlflow::trans_block::hdd6a1a94b7524b90B3d
  32:     0x7fdb9529ac70 - trans::base::trans_closure::h1947fd5123bfe895EYt
  33:     0x7fdb951b9b10 - trans::base::trans_fn::h5d061f11fc4ac1e7j9t
  34:     0x7fdb951b50a0 - trans::base::trans_item::h34ec82732f0498f3Ewu
  35:     0x7fdb952a2490 - trans::base::trans_crate::he5ffa45aaa619f67lsv
  36:     0x7fdb9676a3c0 - driver::phase_4_translate_to_llvm::h98aea3c7bb04643bPFa
  37:     0x7fdb96744350 - driver::compile_input::h04aea004c559b910xba
  38:     0x7fdb96813fe0 - monitor::unboxed_closure.22497
  39:     0x7fdb96813e40 - thunk::F.Invoke<A, R>::invoke::h11849311349984608396
  40:     0x7fdb96812bc0 - rt::unwind::try::try_fn::h13617610205470131813
  41:     0x7fdb962946c0 - rust_try_inner
  42:     0x7fdb962946b0 - rust_try
  43:     0x7fdb96812eb0 - thunk::F.Invoke<A, R>::invoke::h14452289732390470265
  44:     0x7fdb9621c910 - sys::thread::thread_start::h93b0d38960a9fcacqrw
  45:     0x7fdb907cbfe0 - start_thread
  46:     0x7fdb95e49c99 - __clone
  47:                0x0 - <unknown> 

[tamird]

Does not repro:

$ RUST_BACKTRACE=1 RUST_LOG=rustc_trans::trans::expr rustc - <<< 'fn main() { println!("{}", 1u8); }'
$ echo $?
0