Are you running DevMode in Chrome?
See https://code.google.com/p/google-web-toolkit/issues/detail?id=5778
On Wednesday, August 7, 2013 12:52:55 PM UTC+2, stole wrote:
>
> I am getting this error:
> java.lang.IllegalArgumentException: invoke arguments: JS value of type
> number, expected java.lang.Object
> at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:178)
> at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:65)
> at
> com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
> at
> com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
> at
> com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
> at
> com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
> at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
> at
> com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
> at
> com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
>
> Upon closer examination of the get method of JsValueGlue which looks
> something like this:
> public static <T> T get(JsValue value, CompilingClassLoader cl, Class<T>
> type, String msgPrefix) {
> if (type.isPrimitive()) {
> //ommitted for brevity
> }
>
> if (value.isNull() || value.isUndefined()) {
> return null;
> }
> if (value.isWrappedJavaObject()) {
> return type.cast(value.getWrappedJavaObject());
> }
> if (value.isString()) {
> return type.cast(value.getString());
> }
> if (value.isJavaScriptObject()) {
> return type.cast(createJavaScriptObject(value, cl));
> }
>
> // Just don't know what do to with this.
> /*
> * TODO (amitmanjhi): does throwing a HostedModeException here and
> catching
> * a RuntimeException in user test
> * com.google.gwt.dev.jjs.test.HostedTest::testObjectReturns() make
> sense
> */
> throw new IllegalArgumentException(msgPrefix + ": JS value of type "
> + value.getTypeString() + ", expected "
> + TypeInfo.getSourceRepresentation(type));
> }
>
> I saw that there is no check when the value is a number. Not sure if it is
> a bug in JsValueGlue.get or there is a reason number is excluded. I believe
> the code misses something like:
>
> if (value.isNumber()) {
> return type.cast(value.getNumber());
> }
>
> If this is a bug I'd be willing to create an issue and probably a patch if
> the whole procedure isn't too complicated.
>
>
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