From 55c2cf2a3214cc3be11d9e27da5aa419653cac0c Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Tue, 10 Mar 2020 22:25:53 +0100
Subject: [PATCH] add debug option to #[rustc_layout]

---
 src/librustc_passes/layout_test.rs | 7 +++++++
 src/librustc_span/symbol.rs        | 1 +
 2 files changed, 8 insertions(+)

diff --git a/src/librustc_passes/layout_test.rs b/src/librustc_passes/layout_test.rs
index b0edbb46e292..66297eb97273 100644
--- a/src/librustc_passes/layout_test.rs
+++ b/src/librustc_passes/layout_test.rs
@@ -81,6 +81,13 @@ impl LayoutTest<'tcx> {
                             );
                         }
 
+                        sym::debug => {
+                            self.tcx.sess.span_err(
+                                item.span,
+                                &format!("layout debugging: {:#?}", *ty_layout),
+                            );
+                        }
+
                         name => {
                             self.tcx.sess.span_err(
                                 meta_item.span(),
diff --git a/src/librustc_span/symbol.rs b/src/librustc_span/symbol.rs
index 5685505f6948..771de54707e9 100644
--- a/src/librustc_span/symbol.rs
+++ b/src/librustc_span/symbol.rs
@@ -253,6 +253,7 @@ symbols! {
         debug_trait,
         declare_lint_pass,
         decl_macro,
+        debug,
         Debug,
         Decodable,
         Default,