Update MSRV to 1.90 (#21987)

Cargo.toml

@@ -5,7 +5,7 @@ resolver = "2"
 [workspace.package]
 # Please update rustfmt.toml when bumping the Rust edition
 edition = "2024"
-rust-version = "1.89"
+rust-version = "1.90"
 homepage = "https://docs.astral.sh/ruff"
 documentation = "https://docs.astral.sh/ruff"
 repository = "https://github.com/astral-sh/ruff"

crates/ruff/src/args.rs

@@ -10,7 +10,7 @@ use anyhow::bail;
 use clap::builder::Styles;
 use clap::builder::styling::{AnsiColor, Effects};
 use clap::builder::{TypedValueParser, ValueParserFactory};
-use clap::{Parser, Subcommand, command};
+use clap::{Parser, Subcommand};
 use colored::Colorize;
 use itertools::Itertools;
 use path_absolutize::path_dedot;

crates/ruff/src/lib.rs

@@ -9,7 +9,7 @@ use std::sync::mpsc::channel;
 use anyhow::Result;
 use clap::CommandFactory;
 use colored::Colorize;
-use log::{error, warn};
+use log::error;
 use notify::{RecursiveMode, Watcher, recommended_watcher};
 
 use args::{GlobalConfigArgs, ServerCommand};

crates/ruff_formatter/src/macros.rs

@@ -337,7 +337,7 @@ macro_rules! best_fitting {
 #[cfg(test)]
 mod tests {
     use crate::prelude::*;
-    use crate::{FormatState, SimpleFormatOptions, VecBuffer, write};
+    use crate::{FormatState, SimpleFormatOptions, VecBuffer};
 
     struct TestFormat;
 
@@ -385,8 +385,8 @@ mod tests {
 
     #[test]
     fn best_fitting_variants_print_as_lists() {
+        use crate::Formatted;
         use crate::prelude::*;
-        use crate::{Formatted, format, format_args};
 
         // The second variant below should be selected when printing at a width of 30
         let formatted_best_fitting = format!(

crates/ruff_linter/src/fix/edits.rs

@@ -286,12 +286,7 @@ pub(crate) fn add_argument(argument: &str, arguments: &Arguments, tokens: &Token
 
 /// Generic function to add a (regular) parameter to a function definition.
 pub(crate) fn add_parameter(parameter: &str, parameters: &Parameters, source: &str) -> Edit {
-    if let Some(last) = parameters
-        .args
-        .iter()
-        .filter(|arg| arg.default.is_none())
-        .next_back()
-    {
+    if let Some(last) = parameters.args.iter().rfind(|arg| arg.default.is_none()) {
         // Case 1: at least one regular parameter, so append after the last one.
         Edit::insertion(format!(", {parameter}"), last.end())
     } else if !parameters.args.is_empty() {

crates/ruff_linter/src/rules/flake8_simplify/rules/yoda_conditions.rs

@@ -146,7 +146,7 @@ fn reverse_comparison(expr: &Expr, locator: &Locator, stylist: &Stylist) -> Resu
         let left = (*comparison.left).clone();
 
         // Copy the right side to the left side.
-        comparison.left = Box::new(comparison.comparisons[0].comparator.clone());
+        *comparison.left = comparison.comparisons[0].comparator.clone();
 
         // Copy the left side to the right side.
         comparison.comparisons[0].comparator = left;

crates/ruff_python_codegen/src/generator.rs

@@ -1247,6 +1247,7 @@ impl<'a> Generator<'a> {
                     self.p_bytes_repr(&bytes_literal.value, bytes_literal.flags);
                 }
             }
+            #[expect(clippy::eq_op)]
             Expr::NumberLiteral(ast::ExprNumberLiteral { value, .. }) => {
                 static INF_STR: &str = "1e309";
                 assert_eq!(f64::MAX_10_EXP, 308);

crates/ruff_python_formatter/src/cli.rs

@@ -3,7 +3,7 @@
 use std::path::{Path, PathBuf};
 
 use anyhow::{Context, Result};
-use clap::{Parser, ValueEnum, command};
+use clap::{Parser, ValueEnum};
 
 use ruff_formatter::SourceCode;
 use ruff_python_ast::{PySourceType, PythonVersion};

crates/ty_ide/src/completion.rs

@@ -4711,8 +4711,7 @@ from os.<CURSOR>
         let last_nonunderscore = test
             .completions()
             .iter()
-            .filter(|c| !c.name.starts_with('_'))
-            .next_back()
+            .rfind(|c| !c.name.starts_with('_'))
             .unwrap();
 
         assert_eq!(&last_nonunderscore.name, "type_check_only");

crates/ty_project/src/lib.rs

@@ -27,7 +27,6 @@ use std::iter::FusedIterator;
 use std::panic::{AssertUnwindSafe, UnwindSafe};
 use std::sync::Arc;
 use thiserror::Error;
-use tracing::error;
 use ty_python_semantic::add_inferred_python_version_hint_to_diagnostic;
 use ty_python_semantic::lint::RuleSelection;
 use ty_python_semantic::types::check_types;

crates/ty_python_semantic/src/types.rs

@@ -10691,7 +10691,6 @@ pub struct UnionTypeInstance<'db> {
     /// `<class 'str'>`. For `Union[int, str]`, this field is `None`, as we infer
     /// the elements as type expressions. Use `value_expression_types` to get the
     /// corresponding value expression types.
-    #[expect(clippy::ref_option)]
     #[returns(ref)]
     _value_expr_types: Option<Box<[Type<'db>]>>,
 

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.91"
+channel = "1.92"