Bump clippy and compile_error nightly

Author: weiznich

.travis.yml

@@ -38,12 +38,12 @@ matrix:
   allow_failures:
     - rust: nightly
   include:
-  - rust: nightly-2018-07-17
+  - rust: nightly-2018-08-17
     env: CLIPPY_AND_COMPILE_TESTS=YESPLEASE
     script:
     - rustup component add clippy-preview
     - cargo clippy
-    - (cd diesel_compile_tests && cargo update && cargo update -pproc-macro2 --precise "0.4.8" && travis-cargo test)
+    - (cd diesel_compile_tests && travis-cargo test)
   - rust: 1.26.1
     env: RUSTFMT=YESPLEASE
     script:

diesel_compile_tests/Cargo.toml

@@ -7,7 +7,7 @@ authors = ["Sean Griffin <sean@seantheprogrammer.com>"]
 
 [dependencies]
 diesel = { version = "1.3.0", default-features = false, features = ["extras", "sqlite", "postgres", "mysql", "unstable"] }
-compiletest_rs = "=0.3.11"
+compiletest_rs = "=0.3.14"
 
 [replace]
 "diesel:1.3.2" = { path = "../diesel" }

examples/mysql/getting_started_step_1/src/lib.rs

@@ -14,5 +14,5 @@ pub fn establish_connection() -> MysqlConnection {
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
     MysqlConnection::establish(&database_url)
-        .expect(&format!("Error connecting to {}", database_url))
+        .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
 }

examples/postgres/getting_started_step_3/src/lib.rs

@@ -15,16 +15,14 @@ pub fn establish_connection() -> PgConnection {
     dotenv().ok();
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
-    PgConnection::establish(&database_url).expect(&format!("Error connecting to {}", database_url))
+    PgConnection::establish(&database_url)
+        .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
 }
 
 pub fn create_post(conn: &PgConnection, title: &str, body: &str) -> Post {
     use schema::posts;
 
-    let new_post = NewPost {
-        title: title,
-        body: body,
-    };
+    let new_post = NewPost { title, body };
 
     diesel::insert_into(posts::table)
         .values(&new_post)

examples/sqlite/getting_started_step_3/src/lib.rs

@@ -17,16 +17,13 @@ pub fn establish_connection() -> SqliteConnection {
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
     SqliteConnection::establish(&database_url)
-        .expect(&format!("Error connecting to {}", database_url))
+        .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
 }
 
 pub fn create_post(conn: &SqliteConnection, title: &str, body: &str) -> usize {
     use schema::posts;
 
-    let new_post = NewPost {
-        title: title,
-        body: body,
-    };
+    let new_post = NewPost { title, body };
 
     diesel::insert_into(posts::table)
         .values(&new_post)