Intermediate gopher: A weird run-time bug I can't find. net/html package.

The goal for the code is to look at an HTML code and print out a list of the elements on the page. Most of the code is taken from the "net/html" package. So, this one works:

https://play.golang.org/p/nq1LqG2Vo7k

Output:

https://i.redd.it/xuzlx25qbkc11.png

However, when I try to separate the code into a separate package there seem to be some kind of an error. Code:

https://play.golang.org/p/4yJ61ftz9rY

and the associated "parser" package:

https://play.golang.org/p/TTAUDuuShwH

Output:

https://i.redd.it/7qdw6mxqckc11.png

I've been breaking my head against this the whole day testing, retesting, reading documentation, making sure the types were passed consistently, re-writing... nothing helped. I just can't figure out why the mapping breaks down after the first two nodes.

Also, the "wrong" output remains whether I call "parser.Dfs()" function or use the "parser.Extract()" function from the package. I'm 90% sure that the issue lies somewhere with the .Dfs function because that's where the debugger poops itself, but I can't figure out what causes it or how to go about fixing it.

Thank you SO much in advance for taking the time to look at this.

in parser.go

for c := n.FirstChild; c != nil; c = n.NextSibling 

in main.go

for c := n.FirstChild; c != nil; c = c.NextSibling

parser.go should be c = c.NextSibling

holy crap, man! GREAT eye! Thank you, thank you, thank you! I can go home and have a good weekend now! You won't believe the level of frustration I've been experiencing over the last few hours!