rust-lang/rust-analyzer 2026-05-04 on GitHub

Commit: f04c372
Release: 2026-05-04 (v0.3.2887)

New Features

#22238, #22239, #22253 (first contributions) add mismatched-array-pat-len and unused-must-use diagnostics.
#22186 diagnose trait errors 🎉.
#22144, #22168, #22145, #22156, #22197, #22193, #22202 add type-must-be-known, generic-default-refers-to-self, invalid-lhs-of-assignment, pattern-arg-in-extern-fn, non-exhaustive-record-expr and union-expr-must-have-exactly-one-field diagnostics.
#21987 add initial support for gen blocks.
#22178 allow renaming of elided lifetimes.
#22132, #22210 add .new postfix completion based on expected type.
#22179 add unwrap_block assist.

Performance Improvements

#22078 (first contribution) store parse errors into a side table.
#22192 keep nonce when cloning RootDatabase.
#22187 don't intern AdtDef.
#22189, #22131, #22133 drop some Arcs.

Fixes

#22098 (first contribution) avoid importing prelude paths when imports.preferPrelude is disabled.
#22134, #22195 port pattern inference from rustc.
#22141 bring type inference closer to rustc.
#22135 suppress inference variables in monomorphization.
#22214 visit all expressions.
#22169 parse impl restrictions after visibility.
#22170 parse return #[attr] expr.
#22124 don't pick an impl Trait block in generate_function.
#22166 fix placement of async closure capture hints.
#22183 propagate ABI to functions declared in extern blocks.
#22201 improve parser recovery in (a, , b).
#22058 improve prettify_macro_expansion.
#22229 add parentheses in convert_match_to_let_else.
#22142 don't offer completions for already imported Trait as _.
#22154 don't complete where after qualified paths.
#22222 emit else clause in value postfix completions.
#22240 improve indentation in trait item completion.
#22244 handle cycles in expand_glob_import.
#22150 offer is_some_and and is_none_or in apply_demorgan_iterator.
#22151 handle negation in apply_demorgan_iterator.
#22247 handle match arms in unwrap_branch.
#22217 add semicolon after expression in unwrap_branch.
#22184 offer unwrap_branch on non-block match arms.
#22180 offer replace_arith_op on compound assignments.
#22199 offer convert_to_guarded_return on if expression with else if clause.
#22079 handle if matches!() in replace_if_let_with_match.
#22215 fix a stack overflow when displaying projections.
#22265 fix panic on impl ?Sized in introduce_named_type_parameter.
#22207 fix some issues in lower_coroutine_body_with_moved_arguments.
#22122 be more resilient to deleted directories in Analysis::from_single_file.

Internal Improvements

#22129 lower non-destructuring assignments into Pat::Expr instead of Pat::Path.
#22146 clean up string references in postfix completions.
#22190 ignore a test that might be hanging.
#22232 refactor the hir-ty generics data structures.
#22194 refactor InternedCoroutineClosureId.
#22221 fix incorrect offset with multiple indels.
#22121 migrate extract_function assist to SyntaxEditor and remove old version of generate_impl.
#22125, #22020, #22159 migrate replace_qualified_name_with_use, inline_call and generate_function assists to SyntaxEditor.
#22137 migrate convert_into_to_from assist to SyntaxEditor and replace some usages of mod_path_to_ast.
#22241 migrate insert_use and insert_use_as_alias to SyntaxEditor.
#22245 migrate AssocItemList::add_item to SyntaxEditor.
#22243 replace ast::make with SyntaxFactory in to_generic_args.
#22246 remove WhereClause::add_predicate.
#22242 remove some unused methods in edit_in_place.