When a dry-run is executed:

• the lastSuccessfulBuild link is updated
• the build is considered as a "true" build and so, for instance, artifacts from the real lastSuccessfulBuild are deleted if the job is configured to keep only artifacts for one build.

Those issue may be considered as a normal behavior but is it really useful? The link being updated could be kept. But it would be great if the artifacts deletion could be avoided.