Panic on array index out of bounds

[daniellockyer]

Found with honggfuzz.

The following input causes the panic: \x7F\x45\x4C\x46\x02\x07\x35\x38\x35\x33\x30\x38\x32\x30\x37\x30\x34\x32\x31\x36\x34\x37\x33\x32\x37\x35

thread 'main' panicked at 'index 64 out of range for slice of length 26', libcore/slice/mod.rs:2256:5
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at libstd/sys_common/backtrace.rs:71
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:463
   5: std::panicking::begin_panic_fmt
             at libstd/panicking.rs:350
   6: rust_begin_unwind
             at libstd/panicking.rs:328
   7: core::panicking::panic_fmt
             at libcore/panicking.rs:71
   8: core::slice::slice_index_len_fail
             at libcore/slice/mod.rs:2256
   9: <core::ops::range::Range<usize> as core::slice::SliceIndex<[T]>>::index
             at /checkout/src/libcore/slice/mod.rs:2387
  10: core::slice::<impl core::ops::index::Index<I> for [T]>::index
             at /checkout/src/libcore/slice/mod.rs:2238
  11: xmas_elf::header::parse_header
             at /home/user/.cargo/git/checkouts/xmas-elf-0bb86b20f57b2942/720e94d/src/header.rs:28
  12: xmas_elf::ElfFile::new
             at /home/user/.cargo/git/checkouts/xmas-elf-0bb86b20f57b2942/720e94d/src/lib.rs:50
  13: elf_parse::main::{{closure}}
             at /home/user/daniel/targets/common/src/lib.rs:967
             at fuzzer-honggfuzz/src/bin/elf_parse.rs:8
  14: honggfuzz::fuzz
             at /home/user/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/honggfuzz-0.5.20/src/lib.rs:301
  15: elf_parse::main
             at fuzzer-honggfuzz/src/bin/elf_parse.rs:7
  16: std::rt::lang_start::{{closure}}
             at /checkout/src/libstd/rt.rs:74
  17: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:310
  18: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:105
  19: std::rt::lang_start_internal
             at libstd/panicking.rs:289
             at libstd/panic.rs:374
             at libstd/rt.rs:58
  20: std::rt::lang_start
             at /checkout/src/libstd/rt.rs:74
  21: main
  22: __libc_start_main
  23: _start