Fix ICE when using asm! on an unsupported architecture

Fixes #75220

2 files changed, 26 insertions, 0 deletions

diff --git a/src/test/ui/asm/bad-arch.rs b/src/test/ui/asm/bad-arch.rs
new file mode 100644
index 00000000000..eeeeb17dd4f
--- /dev/null
+++ b/src/test/ui/asm/bad-arch.rs
@@ -0,0 +1,18 @@
+// compile-flags: --target wasm32-unknown-unknown
+
+#![feature(no_core, lang_items, rustc_attrs)]
+#![no_core]
+
+#[rustc_builtin_macro]
+macro_rules! asm {
+    () => {};
+}
+#[lang = "sized"]
+trait Sized {}
+
+fn main() {
+    unsafe {
+        asm!("");
+        //~^ ERROR asm! is unsupported on this target
+    }
+}
diff --git a/src/test/ui/asm/bad-arch.stderr b/src/test/ui/asm/bad-arch.stderr
new file mode 100644
index 00000000000..daccc46c6e3
--- /dev/null
+++ b/src/test/ui/asm/bad-arch.stderr
@@ -0,0 +1,8 @@
+error[E0472]: asm! is unsupported on this target
+  --> $DIR/bad-arch.rs:15:9
+   |
+LL |         asm!("");
+   |         ^^^^^^^^^
+
+error: aborting due to previous error
+