error[E0425]: cannot find function `post` in this scope
  --> $DIR/issue-106929.rs:9:5
   |
LL |     post(c, ());
   |     ^^^^ not found in this scope
   |
help: use the `.` operator to call the method `post` on `&Client`
   |
LL -     post(c, ());
LL +     c.post(());
   |

error: aborting due to previous error

For more information about this error, try `rustc --explain E0425`.