I am following http://code.google.com/webtoolkit/makinggwtbetter.html#compiling
but I am not able to compile GWT from sources. I only changed the step
#3 to
svn co http://google-web-toolkit.googlecode.com/svn/releases/2.0/
release20
(as I want to build and test release 2.0). The following are more
details about what I do:

#1
$ uname
Linux

$ java -version
java version "1.6.0_17"
OpenJDK Runtime Environment (IcedTea6 1.7.1) (fedora-34.b17.fc11-
x86_64)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)

$ ant -version
Apache Ant version 1.7.1 compiled on April 16 2010

(...so far it seems I have all I need)

$ cd /home/lukas/projects/gwt2

#2
svn checkout http://google-web-toolkit.googlecode.com/svn/tools/ tools

#3
svn co http://google-web-toolkit.googlecode.com/svn/releases/2.0/
release20

#4
export GWT_TOOLS=/home/lukas/projects/gwt2/tools/

#5
cd release20/
$ ant > nohup.out

BUILD FAILED
/home/lukas/projects/gwt2/release20/build.xml:91: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:27: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:54: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/dev/build.xml:199: Compile failed;
see the compiler error output for details.

Total time: 5 seconds

The content of the nohup.out file follows:

Buildfile: build.xml
Trying to override old definition of task for

build:
Trying to override old definition of task for
Trying to override old definition of task for

dev:
Trying to override old definition of task for
Trying to override old definition of task for

buildtools:
Trying to override old definition of task for
Trying to override old definition of task for

build:
Trying to override old definition of task for
Trying to override old definition of task for

ant-gwt:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

customchecks:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

doctool:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

-do:
Trying to override old definition of task for
Trying to override old definition of task for

build.alldeps.jar:

compiler.standalone:

compile:
[gwt.javac] Compiling 139 source files to /home/lukas/projects/gwt2/
release20/build/out/dev/bin
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:21: package
org.mortbay.jetty.servlet does not exist
[gwt.javac] import org.mortbay.jetty.servlet.ServletHandler;
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:22: package
org.mortbay.jetty.servlet does not exist
[gwt.javac] import org.mortbay.jetty.servlet.ServletHolder;
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:23: package
org.mortbay.jetty.servlet does not exist
[gwt.javac] import org.mortbay.jetty.servlet.ServletMapping;
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:24: package
org.mortbay.jetty.webapp does not exist
[gwt.javac] import org.mortbay.jetty.webapp.WebAppContext;
[gwt.javac]                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:25: package
org.mortbay.jetty.webapp does not exist
[gwt.javac] import org.mortbay.jetty.webapp.WebXmlConfiguration;
[gwt.javac]                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/ServletValidator.java:26: package org.mortbay.log does
not exist
[gwt.javac] import org.mortbay.log.Log;
[gwt.javac]                       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:26: package
com.gargoylesoftware.htmlunit does not exist
[gwt.javac] import com.gargoylesoftware.htmlunit.ScriptResult;
[gwt.javac]                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:27: package
com.gargoylesoftware.htmlunit does not exist
[gwt.javac] import com.gargoylesoftware.htmlunit.WebWindow;
[gwt.javac]                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:28: package
com.gargoylesoftware.htmlunit.html does not exist
[gwt.javac] import com.gargoylesoftware.htmlunit.html.HtmlPage;
[gwt.javac]                                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:29: package
com.gargoylesoftware.htmlunit.javascript does not exist
[gwt.javac] import
com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine;
[gwt.javac]                                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:30: package
com.gargoylesoftware.htmlunit.javascript.host does not exist
[gwt.javac] import
com.gargoylesoftware.htmlunit.javascript.host.Window;
[gwt.javac]                                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:32: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import net.sourceforge.htmlunit.corejs.javascript.Context;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:33: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Function;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:34: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.JavaScriptException;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:35: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Scriptable;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:36: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.ScriptableObject;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:37: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Undefined;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:24: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import net.sourceforge.htmlunit.corejs.javascript.Context;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:25: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Function;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:26: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Scriptable;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:27: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.ScriptableObject;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:28: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Undefined;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:35: cannot find symbol
[gwt.javac] symbol: class ScriptableObject
[gwt.javac] public class JavaObject extends ScriptableObject
implements Function {
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:35: cannot find symbol
[gwt.javac] symbol: class Function
[gwt.javac] public class JavaObject extends ScriptableObject
implements Function {
[gwt.javac]
^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:95: cannot find
symbol
[gwt.javac] symbol  : class HtmlPage
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private HtmlPage htmlPage;
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:98: cannot find
symbol
[gwt.javac] symbol  : class JavaScriptEngine
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private JavaScriptEngine jsEngine;
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:100: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private IdentityHashMap<Scriptable, Integer>
jsObjectToRef;
[gwt.javac]                           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:104: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private Map<Integer, Scriptable> refToJsObject;
[gwt.javac]                        ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:51: cannot find
symbol
[gwt.javac] symbol  : class ScriptableObject
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private class ToStringMethod extends ScriptableObject
implements Function {
[gwt.javac]                                        ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:51: cannot find
symbol
[gwt.javac] symbol  : class Function
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private class ToStringMethod extends ScriptableObject
implements Function {
[gwt.javac]
^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:109: cannot find
symbol
[gwt.javac] symbol  : class Window
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   private final Window window;
[gwt.javac]                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:111: cannot find
symbol
[gwt.javac] symbol  : class Window
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   HtmlUnitSessionHandler(Window window, JavaScriptEngine
jsEngine) {
[gwt.javac]                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:111: cannot find
symbol
[gwt.javac] symbol  : class JavaScriptEngine
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   HtmlUnitSessionHandler(Window window, JavaScriptEngine
jsEngine) {
[gwt.javac]                                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:138: cannot find
symbol
[gwt.javac] symbol  : class HtmlPage
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   public HtmlPage getHtmlPage() {
[gwt.javac]          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:142: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   public JavaObject getOrCreateJavaObject(int refId,
Context context) {
[gwt.javac]                                                      ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:158: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   public Object getToStringTearOff(Context jsContext) {
[gwt.javac]                                    ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:259: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   public Value makeValueFromJsval(Context jsContext,
Object value) {
[gwt.javac]                                   ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:330: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler
[gwt.javac]   Object makeJsvalFromValue(Context jsContext, Value
value) {
[gwt.javac]                             ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:42: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]       SessionData sessionData, Context context) {
[gwt.javac]                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:47: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   static ExceptionOrReturnValue
getReturnFromJavaMethod(Context cx,
[gwt.javac]                                                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:69: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   static boolean isJavaObject(Context jsContext,
ScriptableObject javaObject) {
[gwt.javac]                               ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:69: cannot find symbol
[gwt.javac] symbol  : class ScriptableObject
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   static boolean isJavaObject(Context jsContext,
ScriptableObject javaObject) {
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:73: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   private Context jsContext;
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:79: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public JavaObject(Context jsContext, SessionData
sessionData, int objectRef) {
[gwt.javac]                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:89: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Object call(Context cx, Scriptable scope,
Scriptable thisObj,
[gwt.javac]                      ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:89: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Object call(Context cx, Scriptable scope,
Scriptable thisObj,
[gwt.javac]                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:89: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Object call(Context cx, Scriptable scope,
Scriptable thisObj,
[gwt.javac]                                                    ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:129: cannot find symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]                               ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:129: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]                                           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:129: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:136: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Object get(int index, Scriptable start) {
[gwt.javac]                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:144: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public Object get(String name, Scriptable start) {
[gwt.javac]                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/JavaObject.java:164: cannot find symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class com.google.gwt.dev.shell.JavaObject
[gwt.javac]   public void put(int dispatchId, Scriptable start, Object
value) {
[gwt.javac]                                   ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:56: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Object call(Context context, Scriptable scope,
Scriptable thisObj,
[gwt.javac]                        ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:56: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Object call(Context context, Scriptable scope,
Scriptable thisObj,
[gwt.javac]                                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:56: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Object call(Context context, Scriptable scope,
Scriptable thisObj,
[gwt.javac]
^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:75: cannot find
symbol
[gwt.javac] symbol  : class Context
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:75: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]                                             ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HtmlUnitSessionHandler.java:75: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HtmlUnitSessionHandler.ToStringMethod
[gwt.javac]     public Scriptable construct(Context cx, Scriptable
scope, Object[] args) {
[gwt.javac]            ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:47: package javax.servlet
does not exist
[gwt.javac] import javax.servlet.ServletConfig;
[gwt.javac]                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:48: package javax.servlet
does not exist
[gwt.javac] import javax.servlet.ServletContext;
[gwt.javac]                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:49: package javax.servlet
does not exist
[gwt.javac] import javax.servlet.ServletException;
[gwt.javac]                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:50: package
javax.servlet.http does not exist
[gwt.javac] import javax.servlet.http.HttpServlet;
[gwt.javac]                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:51: package
javax.servlet.http does not exist
[gwt.javac] import javax.servlet.http.HttpServletRequest;
[gwt.javac]                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:52: package
javax.servlet.http does not exist
[gwt.javac] import javax.servlet.http.HttpServletResponse;
[gwt.javac]                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:58: cannot find symbol
[gwt.javac] symbol: class HttpServlet
[gwt.javac] public class GWTShellServlet extends HttpServlet {
[gwt.javac]                                      ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:105: cannot find symbol
[gwt.javac] symbol  : class HttpServlet
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private final Map<ModuleDef, Map<String, HttpServlet>>
loadedServletsByModuleAndClassName = new ReferenceIdentityMap(
[gwt.javac]                                            ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:130: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void doGet(HttpServletRequest request,
HttpServletResponse response)
[gwt.javac]                        ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:130: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void doGet(HttpServletRequest request,
HttpServletResponse response)
[gwt.javac]                                                    ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:131: cannot find symbol
[gwt.javac] symbol  : class ServletException
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       throws ServletException, IOException {
[gwt.javac]              ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:136: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void doPost(HttpServletRequest request,
HttpServletResponse response)
[gwt.javac]                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:136: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void doPost(HttpServletRequest request,
HttpServletResponse response)
[gwt.javac]                                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:137: cannot find symbol
[gwt.javac] symbol  : class ServletException
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       throws ServletException, IOException {
[gwt.javac]              ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:141: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void processFileRequest(HttpServletRequest
request,
[gwt.javac]                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:142: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response) throws IOException {
[gwt.javac]       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:195: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   protected void service(HttpServletRequest request,
[gwt.javac]                          ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:196: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response) throws
ServletException, IOException {
[gwt.javac]       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:196: cannot find symbol
[gwt.javac] symbol  : class ServletException
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response) throws
ServletException, IOException {
[gwt.javac]                                            ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:307: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private boolean autoGenerateResources(HttpServletRequest
request,
[gwt.javac]                                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:308: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response, TreeLogger logger,
String partialPath,
[gwt.javac]       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:339: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private void doGetModule(HttpServletRequest request,
[gwt.javac]                            ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:340: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response, TreeLogger logger,
RequestParts parts)
[gwt.javac]       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:408: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private void doGetPublicFile(HttpServletRequest request,
[gwt.javac]                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:409: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]       HttpServletResponse response, TreeLogger logger,
String partialPath,
[gwt.javac]       ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:628: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private Map<String, String[]>
getParameterMap(HttpServletRequest request) {
[gwt.javac]                                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:805: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private boolean isNotModified(HttpServletRequest
request, long ageOfServerCopy) {
[gwt.javac]                                 ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:857: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private void sendErrorResponse(HttpServletResponse
response, int statusCode,
[gwt.javac]                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:876: cannot find symbol
[gwt.javac] symbol  : class HttpServletResponse
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private void setResponseCacheHeaders(HttpServletResponse
response,
[gwt.javac]                                        ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:928: cannot find symbol
[gwt.javac] symbol  : class HttpServlet
[gwt.javac] location: class com.google.gwt.dev.shell.GWTShellServlet
[gwt.javac]   private HttpServlet tryGetOrLoadServlet(TreeLogger
logger,
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/GWTShellServlet.java:65: cannot find symbol
[gwt.javac] symbol  : class HttpServletRequest
[gwt.javac] location: class
com.google.gwt.dev.shell.GWTShellServlet.RequestParts
[gwt.javac]     public RequestParts(HttpServletRequest request)
[gwt.javac]                         ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:18: package
com.gargoylesoftware.htmlunit.javascript does not exist
[gwt.javac] import
com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine;
[gwt.javac]                                                ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:19: package
com.gargoylesoftware.htmlunit.javascript.host does not exist
[gwt.javac] import
com.gargoylesoftware.htmlunit.javascript.host.Window;
[gwt.javac]                                                     ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:21: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import net.sourceforge.htmlunit.corejs.javascript.Context;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:22: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Function;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:23: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.Scriptable;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:24: package
net.sourceforge.htmlunit.corejs.javascript does not exist
[gwt.javac] import
net.sourceforge.htmlunit.corejs.javascript.ScriptableObject;
[gwt.javac]                                                  ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:31: cannot find
symbol
[gwt.javac] symbol: class ScriptableObject
[gwt.javac] public class HostedModePluginObject extends
ScriptableObject {
[gwt.javac]                                             ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:139: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HostedModePluginObject
[gwt.javac]   private Scriptable connectMethod;
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:140: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HostedModePluginObject
[gwt.javac]   private Scriptable disconnectMethod;
[gwt.javac]           ^
[gwt.javac] /home/lukas/projects/gwt2/release20/dev/core/src/com/
google/gwt/dev/shell/HostedModePluginObject.java:141: cannot find
symbol
[gwt.javac] symbol  : class Scriptable
[gwt.javac] location: class
com.google.gwt.dev.shell.HostedModePluginObject
[gwt.javac]   private Scriptable initMethod;
[gwt.javac]           ^
[gwt.javac] Note: Some input files use or override a deprecated API.
[gwt.javac] Note: Recompile with -Xlint:deprecation for details.
[gwt.javac] Note: Some input files use unchecked or unsafe operations.
[gwt.javac] Note: Recompile with -Xlint:unchecked for details.
[gwt.javac] 100 errors

BUILD FAILED
/home/lukas/projects/gwt2/release20/build.xml:91: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:27: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:54: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/dev/build.xml:199: Compile failed;
see the compiler error output for details.

It seems I am missing some JARs on classpath. So I tried the
following:

$ ant -lib /home/lukas/projects/gwt2/tools/lib/jetty/jetty-6.1.11.jar -
lib /home/lukas/projects/gwt2/tools/lib/htmlunit/htmlunit-2.5.jar -
lib /home/lukas/projects/gwt2/tools/lib/htmlunit/htmlunit-core-
js-2.5.jar -lib /home/lukas/projects/gwt2/tools/lib/protobuf/
protobuf-2.2.0/protobuf-java-rebased-2.2.0.jar -lib /home/lukas/
projects/gwt2/tools/lib/tomcat/catalina-1.0.jar -lib /home/lukas/
projects/gwt2/tools/lib/tomcat/naming-common-1.0.jar -lib /home/lukas/
projects/gwt2/tools/lib/tomcat/naming-resources-1.0.jar -lib /home/
lukas/projects/gwt2/tools/lib/tomcat/tomcat-util-5.1.jar

But still no success:

Buildfile: build.xml
Trying to override old definition of task for

build:
Trying to override old definition of task for
Trying to override old definition of task for

dev:
Trying to override old definition of task for
Trying to override old definition of task for

buildtools:
Trying to override old definition of task for
Trying to override old definition of task for

build:
Trying to override old definition of task for
Trying to override old definition of task for

ant-gwt:
Trying to override old definition of task for
Trying to override old definition of task for

compile:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
build-tools/ant-gwt/bin
[gwt.javac] Compiling 5 source files to /home/lukas/projects/gwt2/
release20/build/out/build-tools/ant-gwt/bin

build:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/lib
      [jar] Building jar: /home/lukas/projects/gwt2/release20/build/
lib/ant-gwt.jar

customchecks:
Trying to override old definition of task for
Trying to override old definition of task for

compile:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
build-tools/customchecks/bin
[gwt.javac] Compiling 2 source files to /home/lukas/projects/gwt2/
release20/build/out/build-tools/customchecks/bin

build:
[jar.bydate] Building jar: /home/lukas/projects/gwt2/release20/build/
lib/gwt-customchecks.jar

doctool:
Trying to override old definition of task for
Trying to override old definition of task for

compile:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
build-tools/doctool/bin
[gwt.javac] Compiling 13 source files to /home/lukas/projects/gwt2/
release20/build/out/build-tools/doctool/bin
[gwt.javac] Note: Some input files use unchecked or unsafe operations.
[gwt.javac] Note: Recompile with -Xlint:unchecked for details.

build:
[jar.bydate] Building jar: /home/lukas/projects/gwt2/release20/build/
lib/gwt-doctool.jar

-do:
Trying to override old definition of task for
Trying to override old definition of task for

build.alldeps.jar:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
dev

compiler.standalone:
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
dev/bin
[gwt.javac] Compiling 5 source files to /home/lukas/projects/gwt2/
release20/build/out/dev/bin
[gwt.javac] Compiling 673 source files to /home/lukas/projects/gwt2/
release20/build/out/dev/bin
[gwt.javac] Note: Some input files use or override a deprecated API.
[gwt.javac] Note: Recompile with -Xlint:deprecation for details.
[gwt.javac] Note: Some input files use unchecked or unsafe operations.
[gwt.javac] Note: Recompile with -Xlint:unchecked for details.
[gwt.javac] Creating empty /home/lukas/projects/gwt2/release20/build/
out/dev/bin/com/google/gwt/core/ext/soyc/package-info.class

compile:
[gwt.javac] Compiling 139 source files to /home/lukas/projects/gwt2/
release20/build/out/dev/bin
[gwt.javac] Note: Some input files use or override a deprecated API.
[gwt.javac] Note: Recompile with -Xlint:deprecation for details.
[gwt.javac] Note: Some input files use unchecked or unsafe operations.
[gwt.javac] Note: Recompile with -Xlint:unchecked for details.
     [copy] Copying 1 file to /home/lukas/projects/gwt2/release20/
build/out/dev/bin
    [mkdir] Created dir: /home/lukas/projects/gwt2/release20/build/out/
dev/sentinels
Trying to override old definition of task for
Trying to override old definition of task for

-filter.props:
     [echo] Branding as GWT version 0.0.0, SVN rev releases/2...@7973
     [copy] Copying 1 file to /home/lukas/projects/gwt2/release20/
build/out/dev/bin
    [touch] Creating /home/lukas/projects/gwt2/release20/build/out/dev/
sentinels/gwt-0.0.0-svn-releases-2.0-7973

build:
Trying to override old definition of task for
Trying to override old definition of task for

user:
Trying to override old definition of task for
Trying to override old definition of task for

dev:
Trying to override old definition of task for
Trying to override old definition of task for

buildtools:
Trying to override old definition of task for
Trying to override old definition of task for

build:
Trying to override old definition of task for
Trying to override old definition of task for

ant-gwt:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

customchecks:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

doctool:
Trying to override old definition of task for
Trying to override old definition of task for

compile:

build:

-do:
Trying to override old definition of task for
Trying to override old definition of task for

build.alldeps.jar:

compiler.standalone:

compile:
Trying to override old definition of task for
Trying to override old definition of task for

-filter.props:

build:
Trying to override old definition of task for
Trying to override old definition of task for

BUILD FAILED
/home/lukas/projects/gwt2/release20/build.xml:92: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:27: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/build.xml:59: The following error
occurred while executing this line:
/home/lukas/projects/gwt2/release20/user/build.xml:65: The following
error occurred while executing this line:
/home/lukas/projects/gwt2/release20/common.ant.xml:337: Cannot find
dependency /home/lukas/projects/gwt2/release20/build/lib/gwt-dev.jar

Any comments or suggestions?

Regards,
Lukas

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