From 378741b703d0501b6ff50a3cf5cde9da8319195d Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Fri, 1 Feb 2019 10:33:44 -0500
Subject: [PATCH] print more information for closures when `-Zverbose` is given

Ideally, we'd probably print the closure substs themselves actually.
---
 src/librustc/util/ppaux.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/librustc/util/ppaux.rs b/src/librustc/util/ppaux.rs
index 1cb9f47bb31f..768fd02e8238 100644
--- a/src/librustc/util/ppaux.rs
+++ b/src/librustc/util/ppaux.rs
@@ -1430,6 +1430,15 @@ define_print! {
                         }
                     }
 
+                    if cx.is_verbose {
+                        write!(
+                            f,
+                            " closure_kind_ty={:?} closure_sig_ty={:?}",
+                            substs.closure_kind_ty(did, tcx),
+                            substs.closure_sig_ty(did, tcx),
+                        )?;
+                    }
+
                     write!(f, "]")
                 }),
                 Array(ty, sz) => {