warnings.rs:6:1: warning: control reaches end of non-void function
warnings.rs:9:7: warning: unused variable 'k'
warnings.rs:11:7: warning: unused variable 'j'
warnings.rs:11:11: warning: variable 'l' is uninitialized when used here
warnings.rs:10:8: note: initialize the variable 'l' to silence this warning
warnings.rs:5:12: warning: unused function 'foo'
warnings.rs:8:13: warning: unused function 'bar'