https://git.ruby-lang.org/ruby.git/commit/?id=2173ae7801

From 2173ae7801c90ef5837b388a7b3f832732785aea Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Sun, 9 Feb 2020 11:04:53 +0900
Subject: spec/ruby/core/file/utime_spec.rb: far future timestamp may be
 trancated

Under some Ext4 filesystem settings, a timestamp is limited up to
0x37fffffff (2446-05-10).

https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout#Inode_Timestamps
> Therefore, timestamps should not overflow until May 2446.

Actually the spec fails under one of our CI environments, like:

```
1)
File.utime allows Time instances in the far future to set mtime and atime FAILED
Expected 2446 == 559444
to be truthy but was false
```
https://rubyci.org/logs/rubyci.s3.amazonaws.com/arch/ruby-master/log/20200208T180002Z.fail.html.gz

diff --git a/spec/ruby/core/file/utime_spec.rb b/spec/ruby/core/file/utime_spec.rb
index 03adc76..9c198af 100644
--- a/spec/ruby/core/file/utime_spec.rb
+++ b/spec/ruby/core/file/utime_spec.rb
@@ -72,11 +72,13 @@ describe "File.utime" do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/file/utime_spec.rb#L72
 
   platform_is :linux do
     platform_is wordsize: 64 do
-      it "allows Time instances in the far future to set mtime and atime" do
+      it "allows Time instances in the far future to set mtime and atime (but some filesystems limit it up to 2446-05-10)" do
+        # https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout#Inode_Timestamps
+        # "Therefore, timestamps should not overflow until May 2446."
         time = Time.at(1<<44)
         File.utime(time, time, @file1)
-        File.atime(@file1).year.should == 559444
-        File.mtime(@file1).year.should == 559444
+        [559444, 2446].should.include? File.atime(@file1).year
+        [559444, 2446].should.include? File.mtime(@file1).year
       end
     end
   end
-- 
cgit v0.10.2


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