Merge pull request #129 from JoshRosen/synchronize-parse-method

Synchronize ClassfileParser.parse() in attempt to prevent parsing errors in concurrent runs

Author: SethTisue

core/src/main/scala/com/typesafe/tools/mima/core/ClassfileParser.scala

@@ -43,7 +43,7 @@ abstract class ClassfileParser(definitions: Definitions) {
 
   def pool: ConstantPool = thepool
 
-  def parse(clazz: ClassInfo) = {
+  def parse(clazz: ClassInfo) = synchronized {
     parsed += 1
     parsedClass = clazz
     in = new BufferReader(clazz.file.toByteArray)