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If you load a java project from a repository using the platform drop (rather than the jdt) you get an Error dialog saying "Errors adding project". The details are 1. "A problem occurred in plugin: org.eclipise.core.resources" 2. "Error instantiating builder: org.eclipse.jdt.core.builder"
Jed, what drop are you using? We tried to make this nicer. The expected behaviour now is: 1) On first build attempt, the user is notified that an attempt was made to instantiate a missing builder 2) On subsequent builds, it silently logs a similar message to the log file. The theory is that this is fairly important information to convey to the user, that the project expects a certain builder to be present and it is not. This usually indicates a missing plugin or that a plugin failed to load. At the same time, we want to allow the user to go on with their work if they are not worried about the missing builder. Can you confirm that this is the behaviour you're seeing?
I was using the platform r1.0 drop as available from eclipse.org. I get the error dialog each time I build . The error notification doesn't inform the user of what's going on. Imagine you didn't know what a builder was, you wouldn't know how to fix the problem. A more appropriate message would be something like yours: "Unable to build project because you are missing a builder, it appears you are missing the following plugins: org.eclipse.jdt.core, ..."
*** This bug has been marked as a duplicate of 3132 ***
