gwt 2.6.0-rc1 and jdk 8

I create a trivial maven based gwt-project on gwt 2.6.0-rc1. The project compilation work fine on jdk7. But it interrupts with an exception jdk8-b117:

[INFO] --- gwt-maven-plugin:2.6.0-rc1:compile (default) @ control-center-server ---
[INFO] Compiling module net.kst_d.rbas.cc.ui.ControlCenter
[INFO] [ERROR] Unexpected internal compiler error
[INFO] java.lang.NullPointerException
[INFO]     at com.google.gwt.dev.javac.JdtCompiler.getCompilerOptions(JdtCompiler.java:534)
[INFO]     at com.google.gwt.dev.javac.JdtCompiler.doCompile(JdtCompiler.java:878)
[INFO]     at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater.compile(CompilationStateBuilder.java:284)
[INFO]     at com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:511)
[INFO]     at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:434)
[INFO]     at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:420)
[INFO]     at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:485)
[INFO]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:241)
[INFO]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:223)
[INFO]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:139)
[INFO]     at com.google.gwt.dev.Compiler.run(Compiler.java:165)
[INFO]     at com.google.gwt.dev.Compiler.run(Compiler.java:130)
[INFO]     at com.google.gwt.dev.Compiler$1.run(Compiler.java:97)
[INFO]     at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)
[INFO]     at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)
[INFO]     at com.google.gwt.dev.Compiler.main(Compiler.java:104)

The project a really trivial. It doesn't consists any widget or some thing else. Only module.gwt.xml аnd empty EntryPoint.

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