>From 6320df9034b5dda9e5c75f077ceebdb444a5518f Mon Sep 17 00:00:00 2001
From: Zheng Junjie <873216071@qq.com>
Date: Thu, 17 Dec 2020 21:02:58 +0800
Subject: [PATCH 4/6] gnu: Add rust-defer-drop-1.

---
 gnu/packages/crates-io.scm | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index dc7d38530b..aa91f7c1aa 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -35971,3 +35971,31 @@ formatters with per-field documentation generated for each structure.
     (synopsis "Fuzzy Matching Library")
     (description "Fuzzy Matching Library")
     (license license:expat)))
+
+(define-public rust-defer-drop-1
+  (package
+    (name "rust-defer-drop")
+    (version "1.0.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "defer-drop" version))
+        (file-name
+          (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1d3pmmn5k2ir3yv8z8fnv4jprs5aijkz5pbdyl8x8kp18m90bbhq"))))
+    (build-system cargo-build-system)
+    (arguments
+      `(#:skip-build?
+        #t
+        #:cargo-inputs
+        (("rust-crossbeam-channel"
+          ,rust-crossbeam-channel-0.4)
+         ("rust-once-cell" ,rust-once-cell-1))))
+    (home-page "")
+    (synopsis
+      "Defer dropping large types to a background thread")
+    (description
+      "Defer dropping large types to a background thread")
+    (license license:mpl2.0)))
-- 
2.29.2