Unable to parse file: Error("expected `:`")

Running cargo nono on my crate hmmm, it produced useful output but it also looks like it crashed.
(base) [13:27:101]% RUST_BACKTRACE=full cargo nono check                    paul@compy386:~/projects/hmmm on master -> origin/master
hmmm: ❌
  - Source code contains an explicit `use std::` statement.
   --> src/lib.rs

  - Did not find a #![no_std] attribute or a simple conditional attribute like #[cfg_attr(not(feature = "std"), no_std)] in the crate source. Crate most likely doesn't support no_std without changes.
  - Source code contains an explicit `use std::` statement.
   --> src/lib.rs

itertools: ❌
  - Crate supports no_std if "use_std" feature is deactivated.
    - Caused by feature flag "use_std" in crate "itertools:0.8.0"
      - Caused by feature flag "default" in crate "itertools:0.8.0"
        - Caused by implicitly enabled default feature from "hmmm:0.1.1"
lazy_static: ✅
thread 'main' panicked at 'Unable to parse file: Error("expected `:`")', /Users/paul/.cargo/registry/src/github.com-1ecc6299db9ec823/cargo-nono-0.1.8/src/check_source.rs:176:40
stack backtrace:
   0:        0x10dcf674e - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h24bb64d98a7e25d6
   1:        0x10dd1d03c - core::fmt::write::h8fdc9cddb01cd8b2
   2:        0x10dcf2ec9 - std::io::Write::write_fmt::hcc3030013983bab6
   3:        0x10dcf85d5 - std::panicking::default_hook::{{closure}}::h95817712c5ff0736
   4:        0x10dcf8312 - std::panicking::default_hook::h34e085f4e0b1062d
   5:        0x10dcf8b5d - std::panicking::rust_panic_with_hook::haf571858f996ac45
   6:        0x10dcf8702 - rust_begin_unwind
   7:        0x10dd272bf - core::panicking::panic_fmt::h11676ba6a846d9f4
   8:        0x10dd271c5 - core::option::expect_none_failed::h312e48bacb63d8ec
   9:        0x10db2248e - cargo_nono::check_source::check_source::h530517e4a9d84434
  10:        0x10db20f27 - cargo_nono::check_source::get_crate_support_from_source::he8edd4d27aa3598d
  11:        0x10db17f00 - cargo_nono::check_and_print_package::h35a5907c80c5bdb7
  12:        0x10db193bf - cargo_nono::main::h43be6d2de439cb88
  13:        0x10db11af6 - std::rt::lang_start::{{closure}}::hc4333fb266f5c967
  14:        0x10dcf8ebf - std::rt::lang_start_internal::hcd84a36052901671
  15:        0x10db196f9 - main
hobofan / cargo-nono

Unable to parse file: Error("expected `:`") #59
