Update for Rust 1.77 (#729)

- rust-lang/rust#118297
-
https://rust-lang.github.io/rust-clippy/master/index.html#/thread_local_initializer_can_be_made_const

Author: jdygert-spok

Cargo.toml

@@ -15,7 +15,7 @@ authors = ["SpiderOak, Inc."]
 edition = "2021"
 license = "UNLICENSED"
 publish = false
-rust-version = "1.76"
+rust-version = "1.77"
 
 [workspace.lints.rust]
 # missing_docs = "warn"

crates/aps-util/src/ffi.rs

@@ -285,27 +285,3 @@ impl TryFrom<Value> for Label {
         ))
     }
 }
-
-/// For `optional int` in policy.
-pub(crate) struct OptionalLabel(Option<Label>);
-
-impl OptionalLabel {
-    const fn none() -> Self {
-        Self(None)
-    }
-
-    const fn some(label: Label) -> Self {
-        Self(Some(label))
-    }
-}
-
-impl TryFrom<Value> for OptionalLabel {
-    type Error = MachineErrorType;
-
-    fn try_from(value: Value) -> Result<Self, Self::Error> {
-        match value {
-            Value::None => Ok(OptionalLabel::none()),
-            v => Ok(OptionalLabel::some(v.try_into()?)),
-        }
-    }
-}

crates/crypto/examples/hsm/hsm.rs

@@ -19,7 +19,7 @@ use serde::{Deserialize, Serialize};
 
 /// An error returned by [`Hsm`].
 #[derive(Debug)]
-pub(crate) enum HsmError {
+pub enum HsmError {
     /// Unable to authenticate the wrapped key.
     Authentication,
     /// The key was not found.

crates/rtrack/src/spira/mod.rs

@@ -164,7 +164,7 @@ fn init() {
 }
 
 thread_local! {
-    static RECORDER: RefCell<Option<Recorder>> = RefCell::new(None);
+    static RECORDER: RefCell<Option<Recorder>> = const { RefCell::new(None) };
 }
 
 /// Records the result of the test.
@@ -253,9 +253,7 @@ enum Needle<'a> {
 #[derive(Debug)]
 enum Match<'a> {
     /// Did not find a match.
-    ///
-    /// It returns the haystack.
-    None(&'a str),
+    None,
     /// Found a prefix match ([`Needle::Prefix`]).
     Prefix { prefix: &'a str, suffix: &'a str },
     /// Found a complete match ([`Needle::Complete`]).
@@ -280,7 +278,7 @@ where
             _ => continue,
         }
     }
-    Match::None(haystack)
+    Match::None
 }
 
 struct Recorder {

crates/runtime/tests/dsl.rs

@@ -109,6 +109,7 @@ impl Display for TestRule {
 }
 
 #[derive(Debug)]
+#[allow(dead_code)] // fields used only via `Debug`
 enum TestError {
     Storage(StorageError),
     Client(ClientError),