I think we should organize a kind of "canvas" to find examples of how unsafe code is used in the wild. To start, it'd be great to enumerate a list of interesting places to look.

Here is my start at a list. Further nominations welcome. I'll try to keep the list up to date. Moreover, if you feel you've examined the source, open any relate issues and we can check it off.

• Standard library:
  • btree, esp. the iterators
  • hashmap
  • ...?
• External libraries:
  • rayon
  • take_mut
  • abomonation
  • ndarray
  • intrusive_collections by @Amanieu, cited in One glossary should be enough #19
  • rental

Other thoughts for packages? Is this a fruitful thing to examine?