Build fails: error: cannot find symbol sumTypeTopicCounts(runnables);

[yurivict]

Buildfile: /usr/ports/science/mallet/work/Mallet-2.1-alpha/build.xml

init:
     [copy] Copying 1 file to /usr/ports/science/mallet/work/Mallet-2.1-alpha/class

compile:
    [javac] /usr/ports/science/mallet/work/Mallet-2.1-alpha/build.xml:62: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 133 source files to /usr/ports/science/mallet/work/Mallet-2.1-alpha/class
    [javac] /usr/ports/science/mallet/work/Mallet-2.1-alpha/src/cc/mallet/topics/DMRTopicModel.java:325: error: cannot find symbol
    [javac] 				sumTypeTopicCounts(runnables);
    [javac] 				^
    [javac]   symbol:   method sumTypeTopicCounts(DMRRunnable[])
    [javac]   location: class DMRTopicModel
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error

Version 2.1-alpha.