1 error[E0275]: overflow evaluating the requirement `K: std::marker::Send`
2 --> $DIR/recursion_limit.rs:44:5
7 = help: consider adding a `#![recursion_limit="20"]` attribute to your crate
8 = note: required because it appears within the type `J`
9 = note: required because it appears within the type `I`
10 = note: required because it appears within the type `H`
11 = note: required because it appears within the type `G`
12 = note: required because it appears within the type `F`
13 = note: required because it appears within the type `E`
14 = note: required because it appears within the type `D`
15 = note: required because it appears within the type `C`
16 = note: required because it appears within the type `B`
17 = note: required because it appears within the type `A`
18 = note: required by `is_send`
20 error: aborting due to previous error(s)