I was facing a strange issue while running
Junit test cases using Java 1.7 + ant.
I debug a lot but not able to find a
solution using ant+ junit.
I came to know that in maven issue has been
fixed using (http://stackoverflow.com/questions/7010665/testng-emma-cobertura-coverage-and-jdk-7-result-in-classformaterror-and-verif)
I made changes to my Junit target and added in jvm args "-XX:-UseSplitVerifier