Rollup merge of #64471 - Mark-Simulacrum:warn-depr-attr, r=Centril

Warn on no_start, crate_id attribute use

These attributes are now deprecated; they don't have any use anymore.

`no_start` stopped being applicable in 3ee916e50b as part of #18967. Ideally we would've removed it pre-1.0, but since that didn't happen let's at least mark it deprecated.

`crate_id` was renamed to `crate_name` in 50ee1ec1b4 as part of #15319. Ideally we would've followed that up with a removal of crate_id itself as well, but that didn't happen; this PR finally marks it as deprecated at least.

Fixes https://github.com/rust-lang/rust/issues/43142 and resolves https://github.com/rust-lang/rust/issues/43144.

src/test/ui/attributes/item-attributes.rs

@@ -11,8 +11,6 @@
 #![rustc_dummy]
 #![rustc_dummy(attr5)]
 
-#![crate_id="foobar#0.1"]
-
 // These are attributes of the following mod
 #[rustc_dummy = "val"]
 #[rustc_dummy = "val"]

src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.rs

@@ -84,12 +84,12 @@
 #![crate_name = "0900"]
 #![crate_type = "bin"] // cannot pass "0800" here
 
-// For #![crate_id], see issue #43142. (I cannot bear to enshrine current behavior in a test)
+#![crate_id = "10"] //~ WARN use of deprecated attribute
 
 // FIXME(#44232) we should warn that this isn't used.
 #![feature(rust1)]
 
-// For #![no_start], see issue #43144. (I cannot bear to enshrine current behavior in a test)
+#![no_start] //~ WARN use of deprecated attribute
 
 // (cannot easily gating state of crate-level #[no_main]; but non crate-level is below at "0400")
 #![no_builtins]

src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr

@@ -186,6 +186,20 @@ LL |     mod inner { #![macro_escape] }
    |
    = help: consider an outer attribute, `#[macro_use]` mod ...
 
+warning: use of deprecated attribute `crate_id`: no longer used.
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:87:1
+   |
+LL | #![crate_id = "10"]
+   | ^^^^^^^^^^^^^^^^^^^ help: remove this attribute
+   |
+   = note: `#[warn(deprecated)]` on by default
+
+warning: use of deprecated attribute `no_start`: no longer used.
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:92:1
+   |
+LL | #![no_start]
+   | ^^^^^^^^^^^^ help: remove this attribute
+
 warning: the feature `rust1` has been stable since 1.0.0 and no longer requires an attribute to enable
   --> $DIR/issue-43106-gating-of-builtin-attrs.rs:90:12
    |

src/test/ui/issues/issue-1251.rs

@@ -6,8 +6,6 @@
 
 #![feature(rustc_private)]
 
-#![crate_id="rust_get_test_int"]
-
 mod rustrt {
     extern crate libc;
 

src/test/ui/issues/issue-6919.rs

@@ -4,7 +4,6 @@
 
 // pretty-expanded FIXME #23616
 
-#![crate_id="issue-6919"]
 extern crate issue6919_3;
 
 pub fn main() {