chore: Upgrade to Rust 1.79 (#570)

* Upgrade to Rust 1.79 and fix clippy warnings

* address feedback

core/src/execution/datafusion/expressions/cast.rs

@@ -259,7 +259,7 @@ macro_rules! cast_float_to_int16_down {
                 .iter()
                 .map(|value| match value {
                     Some(value) => {
-                        let is_overflow = value.is_nan() || value.abs() as i32 == std::i32::MAX;
+                        let is_overflow = value.is_nan() || value.abs() as i32 == i32::MAX;
                         if is_overflow {
                             return Err(cast_overflow(
                                 &format!($format_str, value).replace("e", "E"),
@@ -374,7 +374,7 @@ macro_rules! cast_decimal_to_int16_down {
                     Some(value) => {
                         let divisor = 10_i128.pow($scale as u32);
                         let (truncated, decimal) = (value / divisor, (value % divisor).abs());
-                        let is_overflow = truncated.abs() > std::i32::MAX.into();
+                        let is_overflow = truncated.abs() > i32::MAX.into();
                         if is_overflow {
                             return Err(cast_overflow(
                                 &format!("{}.{}BD", truncated, decimal),

core/src/jvm_bridge/mod.rs

@@ -222,7 +222,7 @@ impl JVMClasses<'_> {
         JVM_CLASSES.get_or_init(|| {
             // A hack to make the `JNIEnv` static. It is not safe but we don't really use the
             // `JNIEnv` except for creating the global references of the classes.
-            let env = unsafe { std::mem::transmute::<_, &'static mut JNIEnv>(env) };
+            let env = unsafe { std::mem::transmute::<&mut JNIEnv, &'static mut JNIEnv>(env) };
 
             let clazz = env.find_class("java/lang/Object").unwrap();
             let object_get_class_method = env

rust-toolchain

@@ -1 +1 @@
-1.78
+1.79