Update to Rust 1.75, fix clippy lints (#1021)

This change updates the minimum version of Rust supported for local dev
and used in the pipelines to 1.75. It also fixes one remaining clippy
lint that is new to 1.75.

.ado/publish.yml

@@ -5,7 +5,7 @@ pr: none
 
 variables:
   CARGO_TERM_COLOR: always
-  RUST_TOOLCHAIN_VERSION: "1.73"
+  RUST_TOOLCHAIN_VERSION: "1.75"
 
 # variables set by pipeline
 # - BASE_IMAGE

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ env:
   CARGO_TERM_COLOR: always
   NODE_VERSION: "18.17.1"
   PYTHON_VERSION: "3.11"
-  RUST_TOOLCHAIN_VERSION: "1.73"
+  RUST_TOOLCHAIN_VERSION: "1.75"
   RUST_TOOLCHAIN_COMPONENTS: rustfmt clippy
 
 jobs:

.github/workflows/publish-playground.yml

@@ -11,7 +11,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  RUST_TOOLCHAIN_VERSION: "1.73"
+  RUST_TOOLCHAIN_VERSION: "1.75"
   RUST_TOOLCHAIN_COMPONENTS: rustfmt clippy
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages

compiler/qsc_fir/src/fir.rs

@@ -521,6 +521,15 @@ impl PackageStore {
     }
 }
 
+impl<'a> IntoIterator for &'a PackageStore {
+    type IntoIter = qsc_data_structures::index_map::Iter<'a, PackageId, Package>;
+    type Item = (PackageId, &'a Package);
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
 /// A trait to find elements in a package.
 pub trait PackageLookup {
     /// Gets a block.

prereqs.py

@@ -13,14 +13,14 @@
 import functools
 
 python_ver = (3, 11)  # Python support for Windows on ARM64 requires v3.11 or later
-rust_ver = (1, 73)  # Ensure Rust version 1.73 or later is installed
+rust_ver = (1, 75)  # Ensure Rust version 1.75 or later is installed
 node_ver = (
     18,
     17,
 )
 wasmpack_ver = (0, 12, 1)  # Latest tested wasm-pack version
-rust_fmt_ver = (1, 6, 0)  # Current version when Rust 1.73 shipped
-clippy_ver = (0, 1, 69)
+rust_fmt_ver = (1, 7, 0)  # Current version when Rust 1.75 shipped
+clippy_ver = (0, 1, 75)
 
 # Disable buffered output so that the log statements and subprocess output get interleaved in proper order
 print = functools.partial(print, flush=True)