Calling to_html to a node of paragraph causes an error

[wakairo]

I tested the following code, and it seems that calling to_html to a node of paragraph causes an error.

Code

require 'commonmarker'

p RUBY_VERSION # => "3.2.3"
p Commonmarker::VERSION # => "2.0.1"

document = Commonmarker.parse("- a")
p document.first_child.type # => :list
p document.first_child.to_html # => "<ul>\n<li>a</li>\n</ul>\n"

document = Commonmarker.parse("ABC")
p document.first_child.type # => :paragraph
p document.first_child.to_html # An error occurs.

Output of the code

$ ruby step_to_reproduce.rb
"3.2.3"
"2.0.1"
:list
"<ul>\n<li>a</li>\n</ul>\n"
:paragraph
thread '<unnamed>' panicked at /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/comrak-0.30.0/src/html.rs:683:44:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
/var/lib/gems/3.2.0/gems/commonmarker-2.0.1-x86_64-linux/lib/commonmarker/node.rb:47:in `node_to_html': called `Option::unwrap()` on a `None` value (fatal)
        from /var/lib/gems/3.2.0/gems/commonmarker-2.0.1-x86_64-linux/lib/commonmarker/node.rb:47:in `to_html'
        from step_to_reproduce.rb:12:in `<main>'

[gjtorikian]

Thanks for the report. I am ack'ing this, but I don't have time for a fix just yet!