LDAModel.scala fails scalastyle on Windows

When executing mvn -Pyarn -Phadoop-2.4 -Dhadoop.version=2.5.2 -DskipTests -X clean package, the build fails with the error:
[DEBUG] Configuring mojo org.scalastyle:scalastyle-maven-plugin:0.4.0:check from plugin realm ClassRealm[plugin>org.sca
astyle:scalastyle-maven-plugin:0.4.0, parent: sun.misc.Launcher$AppClassLoader@1174ec5]
[DEBUG] Configuring mojo 'org.scalastyle:scalastyle-maven-plugin:0.4.0:check' with basic configurator -->
[DEBUG] (f) baseDirectory = C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib
[DEBUG] (f) buildDirectory = C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\target
[DEBUG] (f) configLocation = scalastyle-config.xml
[DEBUG] (f) failOnViolation = true
[DEBUG] (f) failOnWarning = false
[DEBUG] (f) includeTestSourceDirectory = false
[DEBUG] (f) outputEncoding = UTF-8
[DEBUG] (f) outputFile = C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\scalastyle-output.xml
[DEBUG] (f) quiet = false
[DEBUG] (f) skip = false
[DEBUG] (f) sourceDirectory = C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\main\scala
[DEBUG] (f) testSourceDirectory = C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\test\scala
[DEBUG] (f) verbose = false
[DEBUG] (f) project = MavenProject: org.apache.spark:spark-mllib_2.10:1.3.0 @ C:\Users\u6013553\spark-1.3.0\spark-1.3
0\mllib\dependency-reduced-pom.xml
[DEBUG] – end configuration –
[DEBUG] failOnWarning=false
[DEBUG] verbose=false
[DEBUG] quiet=false
[DEBUG] sourceDirectory=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\main\scala
[DEBUG] includeTestSourceDirectory=false
[DEBUG] buildDirectory=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\target
[DEBUG] baseDirectory=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib
[DEBUG] outputFile=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\scalastyle-output.xml
[DEBUG] outputEncoding=UTF-8
[DEBUG] inputEncoding=null
[DEBUG] processing sourceDirectory=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\main\scala encoding=null
error file=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\main\scala\org\apache\spark\mllib\clustering\LDAModel.sc
la message=Input length = 1
Saving to outputFile=C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\scalastyle-output.xml
Processed 143 file(s)
Found 1 errors
Found 0 warnings
Found 0 infos
Finished in 1571 ms

scalastyle-output.xml reports
<?xml version="1.0" encoding="UTF-8"?>
<checkstyle version="5.0">
<file name="C:\Users\u6013553\spark-1.3.0\spark-1.3.0\mllib\src\main\scala\org\apache\spark\mllib\clustering\LDAModel.scala">
<error severity="error" message="Input length = 1"></error>
</file>
</checkstyle>