Class broken error with Joda Time using Scala

I'm adding the Joda Time repository to SBT with

libraryDependencies ++= Seq(
  "joda-time"         % "joda-time"           % "2.1"
)

Then I merrily use it like this:

 val ymd = org.joda.time.format.DateTimeFormat.forPattern("yyyyMMdd")
  ymd.parseDateTime("20121212")

But, when I compile the project in SBT, I get a nasty:

[warn] Class org.joda.convert.FromString not found - continuing with a stub.
[warn] Caught: java.lang.NullPointerException while parsing annotations in /home/jack/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.1.jar(org/joda/time/DateTime.class)
[error] error while loading DateTime, class file '/home/jack/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.1.jar(org/joda/time/DateTime.class)' is broken
[error] (class java.lang.RuntimeException/bad constant pool tag 10 at byte 42)

I tried the 2.0 version of joda-time, but get the same error.

Add this dependency:

> "org.joda" % "joda-convert" % "1.8.1"

It's an optional dependency of joda-time. I had to add it in my own project for the scala compiler to accept working with the joda-time jar.

Your issue seems to be the same.

Version is as at time of editing, latest versions can be found here

I was running into a similar issue:

[warn] Class net.jcip.annotations.NotThreadSafe not found - continuing with a stub.
[warn] Caught: java.lang.NullPointerException while parsing annotations in ~/.ivy2-p2/cache/org.opensaml/xmltooling/jars/xmltooling-1.3.4.jar(org/opensaml/xml/util/IDIndex.class)
[error] error while loading AttributeMap, class file '~/.ivy2-p2/cache/org.opensaml/xmltooling/jars/xmltooling-1.3.4.jar(org/opensaml/xml/util/AttributeMap.class)' is broken
[error] (class java.lang.RuntimeException/bad constant pool index: 0 at pos: 12058)

Explicitly adding a dependency jcip-annotations-1.0.jar resolved the issue.