<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
  <module name="TreeWalker">
    <module name="LineLength"/> <!-- can be any check that requires parsing -->
  </module>
</module>

Starting audit...
com.puppycrawl.tools.checkstyle.api.CheckstyleException: Exception was thrown while processing C.java
        at com.puppycrawl.tools.checkstyle.Checker.processFiles(Checker.java:295)
        at com.puppycrawl.tools.checkstyle.Checker.process(Checker.java:213)
        at com.puppycrawl.tools.checkstyle.Main.runCheckstyle(Main.java:425)
        at com.puppycrawl.tools.checkstyle.Main.runCli(Main.java:359)
        at com.puppycrawl.tools.checkstyle.Main.main(Main.java:174)
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: TokenStreamRecognitionException occurred during the analysis of file C.java.
        at com.puppycrawl.tools.checkstyle.TreeWalker.processFiltered(TreeWalker.java:196)
        at com.puppycrawl.tools.checkstyle.api.AbstractFileSetCheck.process(AbstractFileSetCheck.java:78)
        at com.puppycrawl.tools.checkstyle.Checker.processFile(Checker.java:316)
        at com.puppycrawl.tools.checkstyle.Checker.processFiles(Checker.java:286)
        ... 4 more
Caused by: /tmp/C.java:2:9: unexpected char: '\'
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaLexer.nextToken(GeneratedJavaLexer.java:405)
        at antlr.TokenStreamHiddenTokenFilter.consume(TokenStreamHiddenTokenFilter.java:38)
        at antlr.TokenStreamHiddenTokenFilter.nextToken(TokenStreamHiddenTokenFilter.java:134)
        at antlr.TokenBuffer.fill(TokenBuffer.java:69)
        at antlr.TokenBuffer.LA(TokenBuffer.java:80)
        at antlr.LLkParser.LA(LLkParser.java:52)
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaRecognizer.classBlock(GeneratedJavaRecognizer.java:2512)
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaRecognizer.classDefinition(GeneratedJavaRecognizer.java:634)
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaRecognizer.typeDefinitionInternal(GeneratedJavaRecognizer.java:556)
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaRecognizer.typeDefinition(GeneratedJavaRecognizer.java:389)
        at com.puppycrawl.tools.checkstyle.grammars.GeneratedJavaRecognizer.compilationUnit(GeneratedJavaRecognizer.java:202)
        at com.puppycrawl.tools.checkstyle.TreeWalker.parse(TreeWalker.java:448)
        at com.puppycrawl.tools.checkstyle.TreeWalker.processFiltered(TreeWalker.java:179)
        ... 7 more
Checkstyle ends with 1 errors.