v0.34.0

Added

• WrongCaseClass (MIR1009), WrongCaseFunction (MIR1010), WrongCaseMethod (MIR1011) — new Info-severity diagnostics for case-sensitive identifier references (PHP 8.6 RFC). Covers new expressions, static calls, instanceof, type hints, catch clauses, extends/implements/use-trait declarations, built-in and user-defined functions, instance and static method calls, and use import declarations.
• WrongCaseMethod now fires when a magic method is defined with wrong casing (e.g. __CONSTRUCT instead of __construct).
• InvalidAttribute (MIR1600) — detects invalid #[Attribute] usages: applying #[Attribute] to a function, method, property, or parameter; abstract, interface, or trait classes marked as #[Attribute]; attribute classes with a private constructor; classes used as attributes without the #[Attribute] annotation; attributes applied to elements not matching their declared target; and non-repeatable attributes used more than once on the same element.
• UndefinedAttributeClass — emitted when an attribute references a class that does not exist in the codebase.
• InaccessibleClassConstant (MIR0011) — emitted when a private or protected class constant is accessed from a context that does not have visibility.
• DuplicateClass (MIR1602) — emitted when the same class name is declared more than once within a file, including across braced namespace blocks.
• ParentNotFound (MIR0010) — emitted when parent:: is used (static call, constant access, property fetch, or parent::class) inside a class that has no declared parent.
• OverriddenPropertyAccess — emitted when a subclass reduces the visibility of an inherited property (public→protected, public→private, protected→private).
• NullableReturnStatement — emitted when a function whose return type is non-nullable has a return path that could be null (the non-null part is otherwise compatible with the declared type).
• InvalidClone now also fires when cloning a named object whose __clone() method is private and the caller does not have access.
• @final docblock annotation is now treated as equivalent to the native final keyword for InvalidExtendClass detection.

Fixed

• ATTR_TARGET_ALL corrected from 127 to 63 (the correct sum of the six TARGET_* flags). The wrong value accidentally set bit 6 (IS_REPEATABLE = 64), making every #[Attribute] class without explicit target flags appear repeatable and silently suppressing the "not repeatable" diagnostic.
• NonStaticSelfCall no longer suppresses the diagnostic when the class defines __callStatic. __callStatic only intercepts undefined static methods, not explicitly-defined non-static ones.
• $this no longer leaks into static arrow functions when resolving captured outer scope.

Changed

• FinalClassExtended renamed to InvalidExtendClass to align with Psalm's naming. Update any inline @mir-suppress FinalClassExtended annotations to @mir-suppress InvalidExtendClass.