clippy 0.0.155

A bunch of helpful lints to avoid common pitfalls in Rust
Documentation 
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error: You are trying to use classic C overflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:11:5
   |
11 | \tif a + b < a {
   | \t   ^^^^^^^^^
   |
   = note: `-D overflow-check-conditional` implied by `-D warnings`

error: You are trying to use classic C overflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:14:5
   |
14 | \tif a > a + b {
   | \t   ^^^^^^^^^

error: You are trying to use classic C overflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:17:5
   |
17 | \tif a + b < b {
   | \t   ^^^^^^^^^

error: You are trying to use classic C overflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:20:5
   |
20 | \tif b > a + b {
   | \t   ^^^^^^^^^

error: You are trying to use classic C underflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:23:5
   |
23 | \tif a - b > b {
   | \t   ^^^^^^^^^

error: You are trying to use classic C underflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:26:5
   |
26 | \tif b < a - b {
   | \t   ^^^^^^^^^

error: You are trying to use classic C underflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:29:5
   |
29 | \tif a - b > a {
   | \t   ^^^^^^^^^

error: You are trying to use classic C underflow conditions that will fail in Rust.
  --> $DIR/overflow_check_conditional.rs:32:5
   |
32 | \tif a < a - b {
   | \t   ^^^^^^^^^

error: aborting due to 8 previous errors