[GWT 2.8 SHNAPSHOT] missing stack trace for 'Should only call onDetach when the widget is attached to the browser's document'

Hi all,

I wonder if anyone can help me figure out what is causing this - I am getting java.lang.IllegalStateException: Should only call onDetach when the widget is attached to the browser's document . See below. I suspect this is a GWT exception of some kind, but the stack trace is obfuscated and I can not figure out where the problem is. I tried installing my exception handler with no success - the stack trace is still useless:

 Console.log("Exception logger INSTALLED!!!");

        GWT.setUncaughtExceptionHandler(e -> {

            GWT.log("Unhandled exception", e);

 });

This is happening with Errai 4 SNAPSHOT randomly, but if I figure out the stack trace I can get better understanding of what is going on. How do I get the stack trace ? How do I verify that the gwt Code server has all source maps it needs???

Thanks

================================================================================================================================

Current content widget vanished or changed. Not delivering pageHiding event to HomePage.

ErraiConsoleLogHandler.java:87 14:11:26 WARNING [DefaultNavigatingContainer] Got invalid page name "AboutPage". Redirecting to default page.

ErraiConsoleLogHandler.java:87 java.lang.IllegalStateException: Should only call onDetach when the widget is attached to the browser's document

at Unknown.nC_g$(myApp-0.js@8:16163)

at Unknown.TC_g$(myApp-0.js@9:16405)

at Unknown._C_g$(myApp-0.js@9:16452)

at Unknown.kLf_g$(myApp-0.js@9:47908)

at Unknown.WBe_g$(myApp-0.js@18:37314)

at Unknown.aCe_g$(myApp-0.js@14:37371)

at Unknown.nCe_g$(myApp-0.js@14:37481)

at Unknown.ZPj_g$(myApp-0.js@8:114529)

at Unknown.ZBe_g$(myApp-0.js@36:37344)

at Unknown.WPj_g$(myApp-0.js@16:114507)

at Unknown.aOj_g$(myApp-0.js@17:113981)

at Unknown.iAi_g$(myApp-0.js@3:88783)

at Unknown.jAi_g$(myApp-0.js@15:88755)

at Unknown.y2i_g$(myApp-0.js@32:98783)

at Unknown.A2i_g$(myApp-0.js@17:98822)

at Unknown.c6i_g$(myApp-0.js@45:99823)

at Unknown._5i_g$(myApp-0.js@10:99802)

at Unknown.KAi_g$(myApp-0.js@32:88955)

at Unknown.L6i_g$(myApp-0.js@16:100106)

at Unknown.B7i_g$(myApp-0.js@54:100343)

at Unknown.AJj_g$(myApp-0.js@225:112594)

at Unknown.PDj_g$(myApp-0.js@30:110774)

at Unknown.QDj_g$(myApp-0.js@8:110787)

at Unknown.SDj_g$(myApp-0.js@8:110800)

at Unknown.FDj_g$(myApp-0.js@10:110638)

at Unknown.Sii_g$(myApp-0.js@261:83179)

at Unknown.lambda_0_g$(myApp-0.js@27:96)

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