Multiline code fences are buggy

[agvxov]

To me it seems, the bugs I found must root from fenced code being processed like regular text.
Below are examples files that produce bugs. Hopefully they are easier to interpret than a description would be.

# Bug

## The following code block swallows the rest of the file

\```
<not-supposed-to-be-a-tag-but-syntax-that-happens-to-resemble-a-tag>
not sure if thats relevant; only works (as in, breaks) if the code block is multi-line
\```

this and the code block above will not show up

# Bug2

\```
and if there is an empty line withing the fence

the whole thing fails to render
\```

Notes:

• version 1.0.1
• sorry, i dont know how to properly escape 3 backticks withing markdown, please pretend the '\'s are absent