[GROOVY-6775] GroovyDoc reports Exception: groovy.lang.ReadOnlyPropertyException: Cannot set readonly property: comparator for class: java.util.TreeMap

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.6, 2.1.7, 2.2.0, 2.2.2, 2.3.0
• Fix Version/s: 2.3.2
• Component/s: GroovyDoc
• Labels: contrib exception help-requested treemap usertask
• Environment: Windows 7 Enterpirse 64 Bit, SP1, 16 GB RAM, Gradle 1.9
• Assignee: Paul King
• Reporter: Michael Inden
• Created: 09/May/14 04:43
• Updated: 28/May/14 03:04
• Resolved: 20/May/14 06:40

Description

When starting and creating our help with groovydoc within a gradle build we got the following exception:

groovy.lang.ReadOnlyPropertyException: Cannot set readonly property: comparator for class: java.util.TreeMap

As a result no index-all.html file is generated, so we have no index and overview at all.

=> Stacktrace is attached

Gradle code:

def javaDocForHelp = task javadocForHelp(type: JavaExec, group:"documentation") {
	description = "This creates the documentation of the facade classes from the XYZ engine"
	// beware, the Groovydoc tool behaves strangely in some cases; e.g. if you change the order
	// of arguments or make a mistake, it might silently fail or ignore some parameters
	// for an explanation of the parameters, enter "groovydoc -help" on the command line
	def scriptingEngineSourceDirs = project(":XYZ-engine").sourceSets.main.groovy.srcDirs
	scriptingEngineSourceDirs.each { inputs.dir(it) }
	ext.javadocDir = new File(docDir, "javadoc")
	outputs.dir(javadocDir)
	classpath configurations.compile.files
	main = "org.codehaus.groovy.tools.groovydoc.Main"
	args "-sourcepath", scriptingEngineSourceDirs.join(File.pathSeparator)
	args "-d", javadocDir.path
	// packages
	args "XYZ.scripting.facade"
	args "XYZ.scripting.facade.security"
	args "XYZ.scripting.facade.structure"
	args "XYZ.utils"
	doFirst {
		javadocDir.mkdirs()
	}
}