Make forward compatibility lint deprecated_cfg_attr_crate_type_name deny by default

Author: est31

compiler/rustc_lint_defs/src/builtin.rs

@@ -3068,7 +3068,7 @@ declare_lint! {
     ///
     /// ### Example
     ///
-    /// ```rust
+    /// ```rust,compile_fail
     /// #![cfg_attr(debug_assertions, crate_type = "lib")]
     /// ```
     ///
@@ -3088,7 +3088,7 @@ declare_lint! {
     /// rustc instead of `#![cfg_attr(..., crate_type = "...")]` and
     /// `--crate-name` instead of `#![cfg_attr(..., crate_name = "...")]`.
     pub DEPRECATED_CFG_ATTR_CRATE_TYPE_NAME,
-    Warn,
+    Deny,
     "detects usage of `#![cfg_attr(..., crate_type/crate_name = \"...\")]`",
     @future_incompatible = FutureIncompatibleInfo {
         reference: "issue #91632 <https://github.com/rust-lang/rust/issues/91632>",

src/test/codegen/external-no-mangle-statics.rs

@@ -1,12 +1,11 @@
 // revisions: lib staticlib
 // ignore-emscripten default visibility is hidden
 // compile-flags: -O
+// [lib] compile-flags: --crate-type lib
+// [staticlib] compile-flags: --crate-type staticlib
 // `#[no_mangle]`d static variables always have external linkage, i.e., no `internal` in their
 // definitions
 
-#![cfg_attr(lib, crate_type = "lib")]
-#![cfg_attr(staticlib, crate_type = "staticlib")]
-
 // CHECK: @A = local_unnamed_addr constant
 #[no_mangle]
 static A: u8 = 0;

src/test/ui/cfg/future-compat-crate-attributes-using-cfg_attr.rs

@@ -1,7 +1,6 @@
 // check-fail
 // compile-flags:--cfg foo
 
-#![deny(warnings)]
 #![cfg_attr(foo, crate_type="bin")]
 //~^ERROR `crate_type` within
 //~| WARN this was previously accepted

src/test/ui/cfg/future-compat-crate-attributes-using-cfg_attr.stderr

@@ -1,20 +1,15 @@
 error: `crate_type` within an `#![cfg_attr] attribute is deprecated`
-  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:5:18
+  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:4:18
    |
 LL | #![cfg_attr(foo, crate_type="bin")]
    |                  ^^^^^^^^^^^^^^^^
    |
-note: the lint level is defined here
-  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:4:9
-   |
-LL | #![deny(warnings)]
-   |         ^^^^^^^^
-   = note: `#[deny(deprecated_cfg_attr_crate_type_name)]` implied by `#[deny(warnings)]`
+   = note: `#[deny(deprecated_cfg_attr_crate_type_name)]` on by default
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #91632 <https://github.com/rust-lang/rust/issues/91632>
 
 error: `crate_name` within an `#![cfg_attr] attribute is deprecated`
-  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:10:18
+  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:9:18
    |
 LL | #![cfg_attr(foo, crate_name="bar")]
    |                  ^^^^^^^^^^^^^^^^
@@ -23,7 +18,7 @@ LL | #![cfg_attr(foo, crate_name="bar")]
    = note: for more information, see issue #91632 <https://github.com/rust-lang/rust/issues/91632>
 
 error: `crate_type` within an `#![cfg_attr] attribute is deprecated`
-  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:5:18
+  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:4:18
    |
 LL | #![cfg_attr(foo, crate_type="bin")]
    |                  ^^^^^^^^^^^^^^^^
@@ -32,7 +27,7 @@ LL | #![cfg_attr(foo, crate_type="bin")]
    = note: for more information, see issue #91632 <https://github.com/rust-lang/rust/issues/91632>
 
 error: `crate_name` within an `#![cfg_attr] attribute is deprecated`
-  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:10:18
+  --> $DIR/future-compat-crate-attributes-using-cfg_attr.rs:9:18
    |
 LL | #![cfg_attr(foo, crate_name="bar")]
    |                  ^^^^^^^^^^^^^^^^