Parser hangs on stream of %Y

[ingydotnet]

Found this bug while trying things in https://spec.yaml.io/main/playground/parser.

It froze the entire page because of it. I'll need to add a timeout certainly but thought you should know.

To Reproduce

docker run --rm -it yamlio/yaml-editor bash -c 'echo -n "%Y" | /yaml/bin/dotnet-yamldotnet-event'

[dmitry-ra]

Bug was planted in commit 08c929f when reserved directive support was added.

This while loop is endless - analyzer uses buffer, that don't care about overflows and ranges.

while (!analyzer.Check('#') && !analyzer.IsBreak())
{
    Skip();
}

[ingydotnet]

You can see it here: https://play.yaml.io/main/parser?input=JVk=

Playing around in there it seems to hang on any directive line (including reserved) that does not have a line break.

See https://play.yaml.io/main/parser?input=I3h4eApmb286IGJhcgouLi4KJXh5eiBAJCVeJio=

I added a TIMEOUT message when the parser takes more then 1 second to complete.

[ingydotnet]

Related, directives must be follow by a --- line or the parser should error.

See https://play.yaml.io/main/parser?input=JVhZWgo=
vs https://play.yaml.io/main/parser?input=JVhZWgotLS0K

[aaubry]

A fix for this issue has been released in version 12.0.0.