Auto merge of #73550 - RalfJung:rollup-5huj1k1, r=RalfJung

Rollup of 9 pull requests

Successful merges:

 - #72600 (Properly encode AnonConst into crate metadata)
 - #73055 (remove leftover mentions of `skol` and `int` from the compiler)
 - #73058 (Support sanitizers on aarch64-unknown-linux-gnu)
 - #73171 (RISC-V Emulated Testing)
 - #73404 (Update CFGuard syntax)
 - #73444 (ci: disable alt build during try builds)
 - #73471 (Prevent attacker from manipulating FPU tag word used in SGX enclave)
 - #73539 (Deprecate `Vec::remove_item`)
 - #73543 (Clean up E0695 explanation)

Failed merges:

r? @ghost

Author: bors

.github/workflows/ci.yml

@@ -152,10 +152,6 @@ jobs:
           - name: dist-x86_64-linux
             os: ubuntu-latest-xl
             env: {}
-          - name: dist-x86_64-linux-alt
-            env:
-              IMAGE: dist-x86_64-linux
-            os: ubuntu-latest-xl
     timeout-minutes: 600
     runs-on: "${{ matrix.os }}"
     steps:

src/bootstrap/builder.rs

@@ -1206,7 +1206,7 @@ impl<'a> Builder<'a> {
             );
         }
 
-        // If Control Flow Guard is enabled, pass the `control_flow_guard=checks` flag to rustc
+        // If Control Flow Guard is enabled, pass the `control-flow-guard` flag to rustc
         // when compiling the standard library, since this might be linked into the final outputs
         // produced by rustc. Since this mitigation is only available on Windows, only enable it
         // for the standard library in case the compiler is run on a non-Windows platform.
@@ -1217,7 +1217,7 @@ impl<'a> Builder<'a> {
             && self.config.control_flow_guard
             && compiler.stage >= 1
         {
-            rustflags.arg("-Zcontrol_flow_guard=checks");
+            rustflags.arg("-Zcontrol-flow-guard");
         }
 
         // For `cargo doc` invocations, make rustdoc print the Rust version into the docs