Invalid links clumped together kill all links

[Raynes]

In this example, the invalid link is separated from the well-formed link by one newline. When rendered with pegdown, neither links render.

# Test

This has [two][1] [links][2] defined without a line between them. One is invalid.

 [1]: invalid link
 [2]: https://www.refheap.com/

In this example, the links are separated by two newlines. When rendered with pegdown, the second link renders properly and the first one does not (as expected).

# Test

This has [two][1] [links][2] defined with a line between them. One is invalid.

 [1]: invalid link

 [2]: https://www.refheap.com/

I use pegdown for rendering markdown on refheap and recently noticed this. Here are a couple of pastes exhibiting the issue:

• https://www.refheap.com/15300 bad
• https://www.refheap.com/15302 good

Click the 'raw' link to see the raw text for each paste.

[Raynes]

Blah, github is eating some of the above markdown despite my best efforts to prevent it. Not sure how to fix it. I guess just look at the pastes or click edit on the issue.