@peterdrake you got it! It's a Java lambda Consumer, and I forgot the reference to the argument...

`opener -> opener.close()`

...creating a silent stack overflow.

BTW does anybody know how to share/format code snippets with mastodon ?

@undefined @nKiaru qoto, at least, supports markdown, so in theory you can use `single backticks around inline code` and triple backticks for block code:

```
def f(x):
return x + 1
```

(Hmm, it seem to have lost the indentation.)

@nKiaru You do have to select "markdown" using one of the buttons under the area where you compose the toot (on the web interface).