I have the same error.

On Thursday, October 30, 2014 4:39:03 PM UTC+1, Martijn Wijns wrote:
>
> When trying out 2.7.0-RC1 I get the following error after a page refresh:
>
>          [ERROR] Unexpected internal compiler error
> java.lang.AssertionError
> at com.google.gwt.dev.jjs.impl.UnifyAst.instantiate(UnifyAst.java:1407)
> at com.google.gwt.dev.jjs.impl.UnifyAst.instantiate(UnifyAst.java:1414)
> at com.google.gwt.dev.jjs.impl.UnifyAst.instantiate(UnifyAst.java:1414)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.fullFlowIntoType(UnifyAst.java:1186)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1020)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1733)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1747)
> at com.google.gwt.dev.jjs.impl.UnifyAst.flowInto(UnifyAst.java:1226)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.fullFlowIntoType(UnifyAst.java:1191)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1020)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1733)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1747)
> at com.google.gwt.dev.jjs.impl.UnifyAst.flowInto(UnifyAst.java:1226)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.fullFlowIntoType(UnifyAst.java:1191)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1020)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1733)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1747)
> at com.google.gwt.dev.jjs.impl.UnifyAst.flowInto(UnifyAst.java:1206)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.fullFlowIntoType(UnifyAst.java:1188)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1020)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1645)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1552)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.translate(UnifyAst.java:1653)
> at com.google.gwt.dev.jjs.impl.UnifyAst.resolveType(UnifyAst.java:1556)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:1010)
> at 
> com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)
> at com.google.gwt.dev.jjs.impl.UnifyAst.addRootTypes(UnifyAst.java:733)
> at 
> com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1289)
> at 
> com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1036)
> at 
> com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.precompile(JavaToJavaScriptCompiler.java:953)
> at 
> com.google.gwt.dev.jjs.MonolithicJavaToJavaScriptCompiler.precompile(MonolithicJavaToJavaScriptCompiler.java:303)
> at 
> com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:38)
> at com.google.gwt.dev.Precompile.precompile(Precompile.java:286)
> at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
> at com.google.gwt.dev.Precompile.precompile(Precompile.java:145)
> at com.google.gwt.dev.Compiler.run(Compiler.java:206)
> at com.google.gwt.dev.codeserver.Recompiler.doCompile(Recompiler.java:323)
> at com.google.gwt.dev.codeserver.Recompiler.compile(Recompiler.java:164)
> at com.google.gwt.dev.codeserver.Recompiler.recompile(Recompiler.java:121)
> at com.google.gwt.dev.codeserver.Outbox.recompile(Outbox.java:128)
> at com.google.gwt.dev.codeserver.JobRunner.recompile(JobRunner.java:60)
> at com.google.gwt.dev.codeserver.JobRunner.access$100(JobRunner.java:31)
> at com.google.gwt.dev.codeserver.JobRunner$1.run(JobRunner.java:52)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
>       [ERROR] Compiler returned false
>       [WARN] recompile failed
>       [WARN] continuing to serve previous version
>
> Any ideas on how to solve this or investigate what is happening?
>

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