Source: await_outside_of_async.rs

This diagnostic is triggered if the await keyword is used outside of an async function or block

Source: break_outside_of_loop.rs

This diagnostic is triggered if the break keyword is used outside of a loop.

Source: invalid_cast.rs

This diagnostic is triggered when casting to an unsized type

Source: expected_function.rs

This diagnostic is triggered if a call is made on something that is not callable.

Source: inactive_code.rs

This diagnostic is shown for code with inactive #[cfg] attributes.

Source: incoherent_impl.rs

This diagnostic is triggered if the targe type of an impl is from a foreign crate.

Source: incorrect_case.rs

This diagnostic is triggered if an item name doesn’t follow Rust naming convention.

Source: invalid_cast.rs

This diagnostic is triggered if the code contains an illegal cast

Source: invalid_derive_target.rs

This diagnostic is shown when the derive attribute is used on an item other than a struct, enum or union.

Source: macro_error.rs

This diagnostic is shown for macro expansion errors.

Source: macro_error.rs

This diagnostic is shown for macro expansion errors.

Source: malformed_derive.rs

This diagnostic is shown when the derive attribute has invalid input.

Source: mismatched_arg_count.rs

This diagnostic is triggered if a function is invoked with an incorrect amount of arguments.

Source: mismatched_arg_count.rs

This diagnostic is triggered if a function is invoked with an incorrect amount of arguments.

Source: missing_fields.rs

This diagnostic is triggered if record lacks some fields that exist in the corresponding structure.

Example:

Source: missing_match_arms.rs

This diagnostic is triggered if match block is missing one or more match arms.

Source: missing_unsafe.rs

This diagnostic is triggered if an operation marked as unsafe is used outside of an unsafe function or block.

Source: moved_out_of_ref.rs

This diagnostic is triggered on moving non copy things out of references.

Source: mutability_errors.rs

This diagnostic is triggered on mutating an immutable variable.

Source: no_such_field.rs

This diagnostic is triggered if created structure does not have field provided in record.

Source: non_exhaustive_let.rs

This diagnostic is triggered if a let statement without an else branch has a non-exhaustive pattern.

Source: private_assoc_item.rs

This diagnostic is triggered if the referenced associated item is not visible from the current module.

Source: private_field.rs

This diagnostic is triggered if the accessed field is not visible from the current module.

Source: remove_trailing_return.rs

This diagnostic is triggered when there is a redundant return at the end of a function or closure.

Source: remove_unnecessary_else.rs

This diagnostic is triggered when there is an else block for an if expression whose then branch diverges (e.g. ends with a return, continue, break e.t.c).

Source: replace_filter_map_next_with_find_map.rs

This diagnostic is triggered when .filter_map(..).next() is used, rather than the more concise .find_map(..).

Source: trait_impl_incorrect_safety.rs

Diagnoses incorrect safety annotations of trait impls.

Source: trait_impl_missing_assoc_item.rs

Diagnoses missing trait items in a trait impl.

Source: trait_impl_orphan.rs

Only traits defined in the current crate can be implemented for arbitrary types

Source: trait_impl_redundant_assoc_item.rs

Diagnoses redundant trait items in a trait impl.

Source: type_mismatch.rs

This diagnostic is triggered when the type of an expression or pattern does not match the expected type.

Source: typed_hole.rs

This diagnostic is triggered when an underscore expression is used in an invalid position.

Source: undeclared_label.rs

Source: unimplemented_builtin_macro.rs

This diagnostic is shown for builtin macros which are not yet implemented by rust-analyzer

Source: unlinked_file.rs

This diagnostic is shown for files that are not included in any crate, or files that are part of crates rust-analyzer failed to discover. The file will not have IDE features available.

Source: useless_braces.rs

Diagnostic for unnecessary braces in use items.

Source: unreachable_label.rs

Source: unresolved_assoc_item.rs

This diagnostic is triggered if the referenced associated item does not exist.

Source: unresolved_extern_crate.rs

This diagnostic is triggered if rust-analyzer is unable to discover referred extern crate.

Source: unresolved_field.rs

This diagnostic is triggered if a field does not exist on a given type.

Source: unresolved_ident.rs

This diagnostic is triggered if an expr-position ident is invalid.

Source: unresolved_import.rs

This diagnostic is triggered if rust-analyzer is unable to resolve a path in a use declaration.

Source: unresolved_macro_call.rs

This diagnostic is triggered if rust-analyzer is unable to resolve the path to a macro in a macro invocation.

Source: unresolved_method.rs

This diagnostic is triggered if a method does not exist on a given type.

Source: unresolved_module.rs

This diagnostic is triggered if rust-analyzer is unable to discover referred module.

Source: mutability_errors.rs

This diagnostic is triggered when a mutable variable isn’t actually mutated.

Source: unused_variables.rs

This diagnostic is triggered when a local variable is not used.