Ralf Jung f5e19a355a
Rollup merge of #76722 - ssomers:btree_send_sync, r=Mark-Simulacrum
Test and fix Send and Sync traits of BTreeMap artefacts

Fixes #76686.

I'm not quite sure what all this implies. E.g. comparing with the definitions for `NodeRef` in node.rs,  maybe an extra bound `T: 'a` is useful for something. The test compiles on stable/beta (apart from `drain_filter`) so I bet `Sync` is equally desirable.

r? @Mark-Simulacrum
2020-09-20 12:08:12 +02:00
..