hir_analysis: Avoid repeating unsupported ABI errors

Author: workingjubilee

compiler/rustc_hir_analysis/src/check/check.rs

@@ -58,15 +58,9 @@ pub fn check_abi(tcx: TyCtxt<'_>, hir_id: hir::HirId, span: Span, abi: ExternAbi
 
     match AbiMap::from_target(&tcx.sess.target).canonize_abi(abi, false) {
         AbiMapping::Direct(..) => (),
+        // already erred in rustc_ast_lowering
         AbiMapping::Invalid => {
-            let mut err = struct_span_code_err!(
-                tcx.dcx(),
-                span,
-                E0570,
-                "`{abi}` is not a supported ABI for the current target",
-            );
-            add_abi_diag_help(abi, &mut err);
-            err.emit();
+            tcx.dcx().span_delayed_bug(span, format!("{abi} should be rejected in ast_lowering"));
         }
         AbiMapping::Deprecated(..) => {
             tcx.node_span_lint(UNSUPPORTED_CALLING_CONVENTIONS, hir_id, span, |lint| {