Upgrade to Rust v1.49.0 (bp #14810) (#14811)

* Upgrade to Rust v1.49.0

(cherry picked from commit cbffab7850)

# Conflicts:
#	core/src/crds_value.rs

* rebase

Co-authored-by: Michael Vines <mvines@gmail.com>

sdk/cargo-build-bpf/src/main.rs

@@ -70,11 +70,7 @@ where
     }
 }
 
-fn build_bpf_package(
-    config: &Config,
-    target_directory: &PathBuf,
-    package: &cargo_metadata::Package,
-) {
+fn build_bpf_package(config: &Config, target_directory: &Path, package: &cargo_metadata::Package) {
     let program_name = {
         let cdylib_targets = package
             .targets

sdk/cargo-test-bpf/src/main.rs

@@ -67,11 +67,7 @@ where
     }
 }
 
-fn test_bpf_package(
-    config: &Config,
-    target_directory: &PathBuf,
-    package: &cargo_metadata::Package,
-) {
+fn test_bpf_package(config: &Config, target_directory: &Path, package: &cargo_metadata::Package) {
     let set_test_bpf_feature = package.features.contains_key("test-bpf");
 
     let bpf_out_dir = config

sdk/program/src/program_option.rs

@@ -950,6 +950,17 @@ impl<T> From<Option<T>> for COption<T> {
     }
 }
 
+#[rustversion::since(1.49.0)]
+impl<T> From<COption<T>> for Option<T> {
+    fn from(coption: COption<T>) -> Self {
+        match coption {
+            COption::Some(value) => Some(value),
+            COption::None => None,
+        }
+    }
+}
+
+#[rustversion::before(1.49.0)] // Remove `Into` once the BPF toolchain upgrades to 1.49.0 or newer
 impl<T> Into<Option<T>> for COption<T> {
     fn into(self) -> Option<T> {
         match self {

sdk/program/src/program_pack.rs

@@ -43,7 +43,7 @@ pub trait Pack: Sealed {
         if input.len() != Self::LEN {
             return Err(ProgramError::InvalidAccountData);
         }
-        Ok(Self::unpack_from_slice(input)?)
+        Self::unpack_from_slice(input)
     }
 
     /// Pack into slice

sdk/src/signature.rs

@@ -125,9 +125,9 @@ impl fmt::Display for Signature {
     }
 }
 
-impl Into<[u8; 64]> for Signature {
-    fn into(self) -> [u8; 64] {
-        <GenericArray<u8, U64> as Into<[u8; 64]>>::into(self.0)
+impl From<Signature> for [u8; 64] {
+    fn from(signature: Signature) -> Self {
+        signature.0.into()
     }
 }