Issue #7680 has been updated by Russ Allbery.

For Puppet folks, note that this bug is currently causing us a lot of heartburn 
in Debian because, at present, we'd be releasing a new version with this bug 
and that would potentially break a lot of manifests out in the wild where 
people are using symlinks in their manifests.  We've confirmed that this bug 
definitely affects (consistently) the version of Puppet currently in Debian 
(2.7.18).

A fix that we could pull up to the Debian packages would be greatly appreciated 
and would help a lot of people.
----------------------------------------
Bug #7680: Checksum missmatch when copying followed symlinks
https://projects.puppetlabs.com/issues/7680#change-86874

Author: Mikael Svantesson
Status: Code Insufficient
Priority: Normal
Assignee: 
Category: file
Target version: 
Affected Puppet version: 2.6.8
Keywords: symlink file
Branch: https://github.com/puppetlabs/puppet/pull/1476


When trying to copy a file (using a symlink), Puppet does not calculate the 
correct checksum for the temporary file.

This work in 2.6.7, I have not tried 2.7.x.

**Error:**
    err: /Stage[pre]/Sudo/File[/etc/sudoers]/ensure: change from absent to 
present failed: Could not rename temporary file /etc/sudoers.puppettmp_4293 to 
/etc/sudoers:
    File written to disk did not match checksum; discarding changes ( vs 
{md5}d41d8cd98f00b204e9800998ecf8427e) at 
/etc/puppet/modules/sudo/manifests/init.pp:12 at 
/etc/puppet/modules/sudo/manifests/init.pp:12

**Manifest:**
    class sudo {
      package { 'sudo': ensure => installed }
    
      file { '/etc/sudoers':
        ensure  => file,
        source  => ["puppet:///modules/sudo/sudoers-${hostname}", 
'puppet:///modules/sudo/sudoers'],
        links   => follow,
        replace => true,
        owner   => 'root',
        group   => 'root',
        mode    => '0440',
      }
    }

**File structure:**
    modules/sudo/files
    |-- sudoers
    |-- sudoers-host1
    `-- sudoers-host2 -> sudoers-host1




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