265/299: gnu: Add rust-parking-lot-core-0.4.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit ade2e5e722245ab1caacc3efca1317abd5e28c4c
Author: John Soo <address@hidden>
Date:   Fri Dec 20 08:36:33 2019 -0800

    gnu: Add rust-parking-lot-core-0.4.
    
    * gnu/packages/crates-io.scm (rust-parking-lot-core-0.4): New variable.
    
    Signed-off-by: Efraim Flashner <address@hidden>
---
 gnu/packages/crates-io.scm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index ba772f3..dc786c9 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -6457,6 +6457,21 @@ synchronization primitives.")
         (base32
          "1317j5a1yd03baza2kqqrxb4kr1vxa7rckw4frksl2vrncfcp26b"))))))
 
+(define-public rust-parking-lot-core-0.4
+  (package
+    (inherit rust-parking-lot-core-0.6)
+    (name "rust-parking-lot-core")
+    (version "0.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "parking_lot_core" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1jcq8aq4wv9y5fip7jg12jdwjd5g5r3x857xdma8vcin769cgj4l"))))))
+
 (define-public rust-parity-wasm-0.40
   (package
     (name "rust-parity-wasm")