Code review comment for lp:~widelands-dev/widelands/bug-1734046-statistics_menu

Well, in this case, it seems like I can't, except for the one in the interactive base - I'll get a heap-use-after-free because boost:signals2 will barf on it - it just doesn't like it when the window containing the button is gone, just like with the original bug.

Lambdas are nice though, they are so much easier to read! Me wants all over the code base, preciousss

@bunnybot merge