chore: fix compiler warnings

Author: gmoshkin

tests/src/lib.rs

@@ -56,7 +56,7 @@ fn create_test_spaces() -> Result<(), Error> {
         SpaceFieldFormat::new("id", SpaceFieldType::Unsigned),
         SpaceFieldFormat::new("text", SpaceFieldType::String),
     ]);
-    let mut test_s1 = match Space::create("test_s1", &test_s1_opts) {
+    let test_s1 = match Space::create("test_s1", &test_s1_opts) {
         Ok(s) => s,
         Err(e) => return Err(e),
     };
@@ -280,7 +280,7 @@ pub extern "C" fn start(l: *mut ffi_lua::lua_State) -> c_int {
         Ok(success) => success,
         Err(e) => {
             // Clenaup without handling error to avoid code mess.
-            drop_test_spaces();
+            let _ = drop_test_spaces();
             unsafe { ffi_lua::luaL_error(l, e.to_string().as_ptr() as *const c_schar) };
             return 0;
         }

tests/src/test_box.rs

@@ -2,7 +2,7 @@ use rand::Rng;
 
 use tarantool::index::{IndexOptions, IteratorType};
 use tarantool::sequence::Sequence;
-use tarantool::space::{Space, SpaceCreateOptions, SpaceFieldFormat, SpaceFieldType, SystemSpace};
+use tarantool::space::{Space, SpaceCreateOptions, SystemSpace};
 use tarantool::tuple::Tuple;
 
 use crate::common::{QueryOperation, S1Record, S2Key, S2Record};
@@ -517,13 +517,13 @@ pub fn test_space_drop() {
 
 pub fn test_index_create_drop() {
     let space_opts = SpaceCreateOptions::default();
-    let mut space = Space::create("new_space_7", &space_opts).unwrap();
+    let space = Space::create("new_space_7", &space_opts).unwrap();
 
     let index_opts = IndexOptions::default();
     let create_result = space.create_index("new_index", &index_opts);
 
     if create_result.is_err() {
-        panic!(dbg!(create_result.err()));
+        panic!("{:?}", create_result.err());
     }
     assert_eq!(create_result.is_ok(), true);
 

tests/src/test_coio.rs

@@ -1,5 +1,5 @@
 use std::convert::TryInto;
-use std::io::{self, Read, Write};
+use std::io::{Read, Write};
 use std::net::{TcpListener, TcpStream};
 use std::os::unix::io::{AsRawFd, FromRawFd};
 use std::os::unix::net::UnixStream;