Updating the Eclipse LWB plugin and then building a language project causes build errors

[Gohla]

Summary

Updating the Eclipse LWB plugin and then building a language project causes unexpected/weird build errors.

What you did

Update the Eclipse LWB plugin to a newer version, and then build the language project.

What you expected to happen

Building to succeed.

What actually happened

Building fails with a PIE exception, such as hidden dependencies, overlapping provided files, etc.

Context

• Spoofax version: Any
• Operating system & version: Any

Additional information

Updating Spoofax may change the equals/hashCode of certain objects, which may influence the build and make it go wrong. It can also happen that deserializing an older serialized state may cause wierd errors.

[Gohla]

This could be fixed by adding code to SpoofaxDynamicLoadingEclipseParticipant#getPieModuleCustomizer that stores/loads the Spoofax version and does not deserialize when the version has changed.

[Gohla]

Fixed for release versions in 3fd637e. Not fixed for the development version, but that is not something that users should use anyway.