DpendencySet doesn't work anymore when taken from executedProject

One of my project build just broke after an upgrade to the latest plugins.

assembly contains:

<dependencySets>
<dependencySet>
<outputDirectory>lib</outputDirectory>
<unpack>false</unpack>
<scope>runtime</scope>
</dependencySet>

If I add a logging to the DirectoryMojo class I can see that no dependencies are seen for the project.

+ getLog().debug( "DependencySet[" + output + "]" + " allDependencies: " + allDependencyArtifacts.size()
+ + " filtered: " + dependencyArtifacts.size() );
+

[INFO] [assembly:directory]
[...]
[DEBUG] DependencySet[ubd-1.0.1-SNAPSHOT/lib/] dir perms: 40755 file perms: 100644
[DEBUG] DependencySet[ubd-1.0.1-SNAPSHOT/lib/] allDependencies: 0 filtered: 0
[...]

If I force the plugin to use the original project (not the executedProject), assembly works again (see patch).

As such, this issue very similar to the MCLIRR-2 one encountered by Vincent.