exclude tools with deps that have size asserts

src/bootstrap/src/core/builder.rs

@@ -1614,7 +1614,12 @@ fn cargo(
             rustflags.arg("-Csymbol-mangling-version=legacy");
         }
 
-        if self.config.rust_randomize_layout {
+        // FIXME: the following components don't build with `-Zrandomize-layout` yet:
+        // - wasm-component-ld, due to the `wast`crate
+        // - rust-analyzer, due to the rowan crate
+        // so we exclude entire categories of steps here due to lack of fine-grained control over
+        // rustflags.
+        if self.config.rust_randomize_layout && mode != Mode::ToolStd && mode != Mode::ToolRustc {
             rustflags.arg("-Zrandomize-layout");
         }