There was a similar question today on 
StackOverflow: http://stackoverflow.com/q/13641849/116472
The problem was a method with the same name as the class, apparently GWT 
confused it with a constructor.

On Friday, November 30, 2012 7:20:14 PM UTC+1, Eugene Ivlev wrote:
>
> I have the same problem after switching to gwt 2.5.0 from 2.4.0. Do you 
> have any solution?
>
> пятница, 5 октября 2012 г., 17:30:55 UTC+3 пользователь bkc написал:
>>
>> Bump -- the problem still happens in GWT 2.5 RC2.
>>
>> On Saturday, July 7, 2012 8:27:53 AM UTC-7, bkc wrote:
>>>
>>> Here is the relevant output from the gwtc target in ant with -logLevel 
>>> set to ALL.  I am using SmartGWT 3.0 (the current latest release); the 
>>> error below suggests an incompatibility between the GWT 2.5 RC1 compiler 
>>> and SmartGWT 3.0 (everything compiles fine with GWT 2.4).  Please let me 
>>> know how I can be of further assistance.
>>>
>>>      [java]       Resolving com.smartgwt.client.i18n.SmartGwtMessages_
>>>      [java]          Found type 
>>> 'com.smartgwt.client.i18n.SmartGwtMessages_'
>>>      [java]    [ERROR] An internal compiler exception occurred
>>>      [java] com.google.gwt.dev.jjs.InternalCompilerException: Unexpected 
>>> error during visit.
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:109)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:276)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:116)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JDeclarationStatement.traverse(JDeclarationStatement.java:48)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor$ListContextImmutable.traverse(JModVisitor.java:170)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemoveImmutable(JModVisitor.java:336)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:83)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:137)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:133)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:82)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:426)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:395)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:902)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:627)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:604)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:33)
>>>      [java] at 
>>> com.google.gwt.dev.Precompile.precompile(Precompile.java:278)
>>>      [java] at 
>>> com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
>>>      [java] at 
>>> com.google.gwt.dev.Precompile.precompile(Precompile.java:141)
>>>      [java] at com.google.gwt.dev.Compiler.run(Compiler.java:232)
>>>      [java] at com.google.gwt.dev.Compiler.run(Compiler.java:198)
>>>      [java] at com.google.gwt.dev.Compiler$1.run(Compiler.java:170)
>>>      [java] at 
>>> com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:88)
>>>      [java] at 
>>> com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:82)
>>>      [java] at com.google.gwt.dev.Compiler.main(Compiler.java:177)
>>>      [java] Caused by: java.lang.ClassCastException: 
>>> com.google.gwt.dev.jjs.ast.JMethod cannot be cast to 
>>> com.google.gwt.dev.jjs.ast.JConstructor
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JNewInstance.getTarget(JNewInstance.java:56)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:275)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JNewInstance.traverse(JNewInstance.java:86)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
>>>      [java] at 
>>> com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
>>>      [java] ... 32 more
>>>      [java]       [ERROR] at Main.java(131): <source info not available>
>>>      [java]          com.google.gwt.dev.jjs.ast.JNewInstance
>>>      [java]       [ERROR] at Main.java(131): <source info not available>
>>>      [java]          com.google.gwt.dev.jjs.ast.JDeclarationStatement
>>>      [java]       [ERROR] at Main.java(103): <source info not available>
>>>      [java]          com.google.gwt.dev.jjs.ast.JBlock
>>>      [java]       [ERROR] at Main.java(103): <source info not available>
>>>      [java]          com.google.gwt.dev.jjs.ast.JMethodBody
>>>      [java]       [ERROR] at Main.java(103): private static final void 
>>> $clinit();
>>>      [java] 
>>>      [java]          com.google.gwt.dev.jjs.ast.JMethod
>>>      [java] Shutting down PersistentUnitCache thread
>>>
>>> Thanks,
>>> Bryant
>>>
>>

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