Bump ruby, deps and fix clippy warning for Rust 1.79

Author: wks

mmtk/Cargo.lock

@@ -12,7 +12,7 @@ edition = "2021"
 # Metadata for the Ruby repository
 [package.metadata.ci-repos.ruby]
 repo = "mmtk/ruby" # This is used by actions/checkout, so the format is "owner/repo", not URL.
-rev = "0f475fdfee76247c516464aac04022338a5ed824"
+rev = "c9ff790aa7692fc941757cd9ca1d2e64e63cb9b6"
 
 [lib]
 name = "mmtk_ruby"

mmtk/Cargo.toml

@@ -19,6 +19,12 @@ pub struct RubyBindingFast {
     pub gc_enabled: AtomicBool,
 }
 
+impl Default for RubyBindingFast {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl RubyBindingFast {
     pub const fn new() -> Self {
         Self {
@@ -33,6 +39,12 @@ pub struct RubyBindingFastMut {
     pub suffix_size: usize,
 }
 
+impl Default for RubyBindingFastMut {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl RubyBindingFastMut {
     pub const fn new() -> Self {
         Self { suffix_size: 0 }