[bug#55673] [PATCH] cache: Catch valid integer for 'last-expiry-cleanup'.

[zimoun]

Fixes <http://issues.guix.gnu.org/55638>.

* guix/cache.scm (maybe-remove-expired-cache-entries)[last-expiry-date]: Check
if the date is a valid integer.
---
 guix/cache.scm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/guix/cache.scm b/guix/cache.scm
index 51009809bd..4a74c42afe 100644
--- a/guix/cache.scm
+++ b/guix/cache.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2020, 2021 Ludovic Courtès 
<ludo@gnu.org>
+;;; Copyright © 2022 Simon Tournier <zimon.toutoune@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -93,7 +94,9 @@ (define expiry-file
   (define last-expiry-date
     (catch 'system-error
       (lambda ()
-        (call-with-input-file expiry-file read))
+        (match (call-with-input-file expiry-file read)
+          ((? integer? date) date)
+          (_ 0)))
       (const 0)))
 
   (when (obsolete? last-expiry-date now cleanup-period)

base-commit: 38bf6c7d0cb588e8d4546db7d2e0bae2ec25183d
-- 
2.36.0