thread 'main' panicked at 'index out of bounds: the len is 0 but the index is 0'

[sigaloid]

fn main() {
    let _ = markdown::to_html("- ");
}

stack backtrace:
   0:     0x562a7fae041c - std::backtrace_rs::backtrace::libunwind::trace::hc6c3491277866fea
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x562a7fae041c - std::backtrace_rs::backtrace::trace_unsynchronized::h4524f073368a5b13
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x562a7fae041c - std::sys_common::backtrace::_print_fmt::h0d0cace6159902af
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x562a7fae041c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3e6af6f05919a7fc
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x562a7fafc09c - core::fmt::write::h72801a82c94e6ff1
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/fmt/mod.rs:1163:17
   5:     0x562a7fadd985 - std::io::Write::write_fmt::ha4f5d34aaccbac84
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/io/mod.rs:1696:15
   6:     0x562a7fae1c50 - std::sys_common::backtrace::_print::heed69f5ce9a8e189
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x562a7fae1c50 - std::sys_common::backtrace::print::h5f3918bd80c09252
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x562a7fae1c50 - std::panicking::default_hook::{{closure}}::h5af30648530eb3d0
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:210:50
   9:     0x562a7fae17fb - std::panicking::default_hook::he88d5fb1ba1b4c19
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:227:9
  10:     0x562a7fae2434 - std::panicking::rust_panic_with_hook::h01febc308b2b313b
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:602:17
  11:     0x562a7fae1ee0 - std::panicking::begin_panic_handler::{{closure}}::h24a6d13f5560b71f
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:499:13
  12:     0x562a7fae08c4 - std::sys_common::backtrace::__rust_end_short_backtrace::h3e2917f0da9fbc5c
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:139:18
  13:     0x562a7fae1e49 - rust_begin_unwind
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:495:5
  14:     0x562a7fafb101 - core::panicking::panic_fmt::h7b8580d81fcbbacd
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/panicking.rs:107:14
  15:     0x562a7fafb0c2 - core::panicking::panic_bounds_check::h63650a5dfc9aa86f
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/panicking.rs:76:5
  16:     0x562a7f8f6dfe - <usize as core::slice::index::SliceIndex<[T]>>::index::h57953ecc531e17b4
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/slice/index.rs:184:10
  17:     0x562a7f90a207 - core::slice::index::<impl core::ops::index::Index<I> for [T]>::index::h858ea629fd93c99c
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/slice/index.rs:15:9
  18:     0x562a7f8eefe9 - <alloc::vec::Vec<T,A> as core::ops::index::Index<I>>::index::hda3152a2dd28b26d
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/alloc/src/vec/mod.rs:2496:9
  19:     0x562a7f90d278 - markdown::parser::block::unordered_list::parse_unordered_list::h4badd496130fec7b
                               at /home/matt/.cargo/registry/src/github.com-1ecc6299db9ec823/markdown-0.3.0/src/parser/block/unordered_list.rs:84:44
  20:     0x562a7f8f5940 - markdown::parser::block::parse_block::h6aa1489b4128334c
                               at /home/matt/.cargo/registry/src/github.com-1ecc6299db9ec823/markdown-0.3.0/src/parser/block/mod.rs:71:5
  21:     0x562a7f8f4e4f - markdown::parser::block::parse_blocks::h76c435afecc4a1da
                               at /home/matt/.cargo/registry/src/github.com-1ecc6299db9ec823/markdown-0.3.0/src/parser/block/mod.rs:27:15
  22:     0x562a7f90b12a - markdown::parser::parse::h1c2a7ad7977b98b1
                               at /home/matt/.cargo/registry/src/github.com-1ecc6299db9ec823/markdown-0.3.0/src/parser/mod.rs:43:5
  23:     0x562a7f8f7f12 - markdown::to_html::hbf9e013e30e75fff
                               at /home/matt/.cargo/registry/src/github.com-1ecc6299db9ec823/markdown-0.3.0/src/lib.rs:29:18
  24:     0x562a7f8ed1c9 - markdown_fuzz::main::h6cdf86ba5589bddf
                               at /home/matt/rust/markdown-fuzz/src/main.rs:2:13
  25:     0x562a7f8ed2fb - core::ops::function::FnOnce::call_once::h520c396ff3575786
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/ops/function.rs:227:5
  26:     0x562a7f8ed28e - std::sys_common::backtrace::__rust_begin_short_backtrace::ha170754eceb27b9b
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/sys_common/backtrace.rs:123:18
  27:     0x562a7f8ed261 - std::rt::lang_start::{{closure}}::h6196b6819679e06e
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/rt.rs:146:18
  28:     0x562a7fadfcb1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6743157f0325d450
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/core/src/ops/function.rs:259:13
  29:     0x562a7fadfcb1 - std::panicking::try::do_call::hc65378359d322d46
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:403:40
  30:     0x562a7fadfcb1 - std::panicking::try::h52b83ca0140efb28
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:367:19
  31:     0x562a7fadfcb1 - std::panic::catch_unwind::h0ba25f4b0d3448dc
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panic.rs:133:14
  32:     0x562a7fadfcb1 - std::rt::lang_start_internal::{{closure}}::ha65f28100c5ad390
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/rt.rs:128:48
  33:     0x562a7fadfcb1 - std::panicking::try::do_call::h5db5edfaf5b749d9
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:403:40
  34:     0x562a7fadfcb1 - std::panicking::try::h62409771d6cd0419
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panicking.rs:367:19
  35:     0x562a7fadfcb1 - std::panic::catch_unwind::h386261fb8f018fab
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/panic.rs:133:14
  36:     0x562a7fadfcb1 - std::rt::lang_start_internal::h699f3530566c1833
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/rt.rs:128:20
  37:     0x562a7f8ed230 - std::rt::lang_start::ha828cf927dff4f89
                               at /rustc/efd0483949496b067cd5f7569d1b28cd3d5d3c72/library/std/src/rt.rs:145:17
  38:     0x562a7f8ed1fc - main
  39:     0x7f56da310b25 - __libc_start_main
  40:     0x562a7f8ed09e - _start
  41:                0x0 - <unknown>