Auto merge of #4368 - RalfJung:invalid_ref, r=oli-obk

deprecate invalid_ref lint

This fixes the `invalid_ref` lint test to no longer fail when rust-lang/rust#63346 lands.  I also fixed the lint itself, because its wording made no sense: there is no "reference to zeroed/uninitialized memory" here.

changelog: none

clippy_lints/src/deprecated_lints.rs

@@ -113,3 +113,12 @@ declare_deprecated_lint! {
     pub UNSAFE_VECTOR_INITIALIZATION,
     "the replacement suggested by this lint had substantially different behavior"
 }
+
+/// **What it does:** Nothing. This lint has been deprecated.
+///
+/// **Deprecation reason:** This lint has been superseded by the warn-by-default
+/// `invalid_value` rustc lint.
+declare_clippy_lint! {
+    pub INVALID_REF,
+    "superseded by rustc lint `invalid_value`"
+}

clippy_lints/src/lib.rs

@@ -200,7 +200,6 @@ pub mod inherent_to_string;
 pub mod inline_fn_without_body;
 pub mod int_plus_one;
 pub mod integer_division;
-pub mod invalid_ref;
 pub mod items_after_statements;
 pub mod large_enum_variant;
 pub mod len_zero;
@@ -558,7 +557,6 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry<'_>, conf: &Conf) {
     reg.register_late_lint_pass(box bytecount::ByteCount);
     reg.register_late_lint_pass(box infinite_iter::InfiniteIter);
     reg.register_late_lint_pass(box inline_fn_without_body::InlineFnWithoutBody);
-    reg.register_late_lint_pass(box invalid_ref::InvalidRef);
     reg.register_late_lint_pass(box identity_conversion::IdentityConversion::default());
     reg.register_late_lint_pass(box types::ImplicitHasher);
     reg.register_early_lint_pass(box redundant_static_lifetimes::RedundantStaticLifetimes);
@@ -736,7 +734,6 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry<'_>, conf: &Conf) {
         inherent_to_string::INHERENT_TO_STRING_SHADOW_DISPLAY,
         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
         int_plus_one::INT_PLUS_ONE,
-        invalid_ref::INVALID_REF,
         large_enum_variant::LARGE_ENUM_VARIANT,
         len_zero::LEN_WITHOUT_IS_EMPTY,
         len_zero::LEN_ZERO,
@@ -1094,7 +1091,6 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry<'_>, conf: &Conf) {
         infinite_iter::INFINITE_ITER,
         inherent_to_string::INHERENT_TO_STRING_SHADOW_DISPLAY,
         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
-        invalid_ref::INVALID_REF,
         literal_representation::MISTYPED_LITERAL_SUFFIXES,
         loops::FOR_LOOP_OVER_OPTION,
         loops::FOR_LOOP_OVER_RESULT,

clippy_lints/src/utils/paths.rs

@@ -37,7 +37,6 @@ pub const HASHMAP_ENTRY: [&str; 5] = ["std", "collections", "hash", "map", "Entr
 pub const HASHSET: [&str; 5] = ["std", "collections", "hash", "set", "HashSet"];
 pub const INDEX: [&str; 3] = ["core", "ops", "Index"];
 pub const INDEX_MUT: [&str; 3] = ["core", "ops", "IndexMut"];
-pub const INIT: [&str; 4] = ["core", "intrinsics", "", "init"];
 pub const INTO: [&str; 3] = ["core", "convert", "Into"];
 pub const INTO_ITERATOR: [&str; 5] = ["core", "iter", "traits", "collect", "IntoIterator"];
 pub const IO_READ: [&str; 3] = ["std", "io", "Read"];
@@ -50,8 +49,6 @@ pub const LINT_PASS: [&str; 3] = ["rustc", "lint", "LintPass"];
 pub const MEM_DISCRIMINANT: [&str; 3] = ["core", "mem", "discriminant"];
 pub const MEM_FORGET: [&str; 3] = ["core", "mem", "forget"];
 pub const MEM_REPLACE: [&str; 3] = ["core", "mem", "replace"];
-pub const MEM_UNINIT: [&str; 3] = ["core", "mem", "uninitialized"];
-pub const MEM_ZEROED: [&str; 3] = ["core", "mem", "zeroed"];
 pub const MUTEX: [&str; 4] = ["std", "sync", "mutex", "Mutex"];
 pub const OPEN_OPTIONS: [&str; 3] = ["std", "fs", "OpenOptions"];
 pub const OPS_MODULE: [&str; 2] = ["core", "ops"];
@@ -109,7 +106,6 @@ pub const TO_STRING_METHOD: [&str; 4] = ["alloc", "string", "ToString", "to_stri
 pub const TRANSMUTE: [&str; 4] = ["core", "intrinsics", "", "transmute"];
 pub const TRY_FROM_ERROR: [&str; 4] = ["std", "ops", "Try", "from_error"];
 pub const TRY_INTO_RESULT: [&str; 4] = ["std", "ops", "Try", "into_result"];
-pub const UNINIT: [&str; 4] = ["core", "intrinsics", "", "uninit"];
 pub const VEC: [&str; 3] = ["alloc", "vec", "Vec"];
 pub const VEC_DEQUE: [&str; 4] = ["alloc", "collections", "vec_deque", "VecDeque"];
 pub const VEC_FROM_ELEM: [&str; 3] = ["alloc", "vec", "from_elem"];