Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
On 27 Jan., 10:07, dduck anders.johansen.a...@gmail.com wrote: I understand that a better stack trace mechanism is in the works, but obviously it is not yet part of the production branch of GWT. In the mean time we are left to our most ancient tools, the printf and our naked brain :) Turns out it is in the production branch, only not as a default. To enable, add these two lines to the module file: set-property name=compiler.emulatedStack value=true/ set-configuration-property name=compiler.emulatedStack.recordFileNames value=true/ This will enable stack traces on this format: ... Unknown.Hh(JsArrayString.java:42) Unknown.Pf(StackTraceCreator.java:366) Unknown.IN(SpinnerWhileRequestingViewer.java:129) Unknown.CL(TrappableCommand.java:35) Unknown.iL(TrappableCommand.java:24) Unknown.Zw(CommandExecutor.java:310) Unknown.mx(Duration.java:29) Unknown.lf(Timer.java:141) Unknown.anonymous(Timer.java:60) Unknown.Tg(Impl.java:146) Unknown.anonymous(Impl.java:56) ... These stack traces would have saved me at least a man week, if only I had known. Guess you have to R *all* TFM to be sure :D Regards, Anders -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
On 21 Jan., 15:44, John V Denley johnvden...@googlemail.com wrote: for you dduck, the way forward would be to do as leduque suggests above and set the compile time flag for style to detailed and that should give you a much better idea where the error is, you might find the following link useful:http://code.google.com/webtoolkit/doc/1.6/FAQ_DebuggingAndCompiling.h... I have done so, but the debugging still points to a piece of JavaScript that does not have a clear correspondence to the original Java code :( Regards, Anders -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
On 26 Jan., 13:11, dduck anders.johansen.a...@gmail.com wrote:
I have done so, but the debugging still points to a piece of
JavaScript that does not have a clear correspondence to the original
Java code :(
Specifically it points to this line:
function Y$(a){var b;if(a.Z()){return KK(new IK,Wob)}else{b=lJ(new
fJ,Ohb+a._()+Xob);b.d=true;oJ(b,vV(new _$,a));return b}}
The error is: java.lang.IndexOutOfBoundsException: Can't get element
58
Regards,
Anders
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Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
...and another, this time the one I am actually after:
Class: com.google.gwt.core.client.JavaScriptException
Message:
(TypeError): Result of expression 'a' [null] is not an object.
line: 1520
sourceId: 4968015904
sourceURL:
http://worm:8080/myShopInstall/gwt-results-app/5DF30FE3D0E594F4B64889C27BA79632.cache.html
expressionBeginOffset: 18742
expressionCaretOffset: 18743
expressionEndOffset: 18745
Line 1520 in the file looks like this:
function ZF(a){var b;b=PP(new MP,a.g);while(b.bb.c.d-1){RP(b);TP(b)}}
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Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
BTW, Your code stills looks like compiled with -style obfuscated.
On Jan 26, 6:55 am, dduck anders.johansen.a...@gmail.com wrote:
...and another, this time the one I am actually after:
Class: com.google.gwt.core.client.JavaScriptException
Message:
(TypeError): Result of expression 'a' [null] is not an object.
line: 1520
sourceId: 4968015904
sourceURL:http://worm:8080/myShopInstall/gwt-results-app/5DF30FE3D0E594F4B64889...
expressionBeginOffset: 18742
expressionCaretOffset: 18743
expressionEndOffset: 18745
Line 1520 in the file looks like this:
function ZF(a){var b;b=PP(new MP,a.g);while(b.bb.c.d-1){RP(b);TP(b)}}
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Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
On 26 Jan., 16:15, Djabi george.djaba...@gmail.com wrote:
BTW, Your code stills looks like compiled with -style obfuscated.
You are right.
Thought I had fixed it, but hadn't.
Here is the unobfuscated code:
function com_google_gwt_user_client_ui_Panel_
$clear__Lcom_google_gwt_user_client_ui_Panel_2V(this$static){
var it;
it = com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$WidgetCollection
$WidgetIterator__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2(new com_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator, this
$static.com_google_gwt_user_client_ui_ComplexPanel_children);
while (it.com_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_index
it.com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_this
$0.com_google_gwt_user_client_ui_WidgetCollection_size - 1) {
com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$next__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2Lcom_google_gwt_user_client_ui_Widget_2(it);
com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$remove__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2V(it);
}
}
Error points to line starting with it = com_google..
Error message is:
(TypeError): Result of expression 'this$static' [null] is not an
object.
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Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
This is beyond anything Ive come across before, sorry I cant help anymore,
though it looks like i did manage to push you in the right direction!
good luck figuring it out...
2010/1/26 dduck anders.johansen.a...@gmail.com
On 26 Jan., 16:15, Djabi george.djaba...@gmail.com wrote:
BTW, Your code stills looks like compiled with -style obfuscated.
You are right.
Thought I had fixed it, but hadn't.
Here is the unobfuscated code:
function com_google_gwt_user_client_ui_Panel_
$clear__Lcom_google_gwt_user_client_ui_Panel_2V(this$static){
var it;
it = com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$WidgetCollection
$WidgetIterator__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2(new com_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator, this
$static.com_google_gwt_user_client_ui_ComplexPanel_children);
while (it.com_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_index
it.com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_this
$0.com_google_gwt_user_client_ui_WidgetCollection_size - 1) {
com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$next__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2Lcom_google_gwt_user_client_ui_Widget_2(it);
com_google_gwt_user_client_ui_WidgetCollection$WidgetIterator_
$remove__Lcom_google_gwt_user_client_ui_WidgetCollection
$WidgetIterator_2V(it);
}
}
Error points to line starting with it = com_google..
Error message is:
(TypeError): Result of expression 'this$static' [null] is not an
object.
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Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
I have a similar problem with a compiled GWT javascript, but it only fails in IE. Im not sure where in eclipse to set style=DETAILED and even if I did, is there a firebug dev tool for debugging javascript in IE? I dont mind taking some time to figure out how to set the style=DETAILED, but only if there is some way to debug the problem once ive done it! Thanks, John On Jan 15, 2:39 pm, LEDUQUE Mickaël mledu...@gmail.com wrote: Y(ou'll probably only have this kind ofexceptioninjavascript compiled app, so you won't be able to use hosted/devmode to inspect it. I'd probably compile the application with style=DETAILED and use tools like firebug (Firefox) or webkit developer tools (chrome/safari) todebugthat. Of course, if this really is a big application, it may take some resources to trace into DETAILEDjavascript(I know for example Firebug has some problems with really big js files). -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
This can happen in devmode. I found one today - it was an exception in a deferred command while manipulating an xml document. To debug in devmode is relatively easy - simply debug before it breaks and step through. In web mode I have encountered a few of these as well. Here is our approach: 1. Maintain a global action list which tracks most (e.g. Actions.add (actionname)) 2. In your uncaught exception handler, pull in the action list and send that back to the server which then logs the result and sends emails etc. We also send back the entire page dom structure as an attachment to the email so we can take a look at the data on the page at the time of the error. This has enabled us to find out which customer, what they were doing and the timing of what they did - then we can easily replicate it in devmode. Hope this helps On Jan 15, 10:45 pm, dduck anders.johansen.a...@gmail.com wrote: In a relatively large project I sometimes get this exception: Class: com.google.gwt.core.client.JavaScriptException Message: (TypeError): Result of expression 'a' [null] is not an object. line: 1513 sourceId: 4996591080 sourceURL:http://worm:8080/myShopInstall/gwt-results-app/F89E790362E6204FFEC75F... expressionBeginOffset: 18437 expressionCaretOffset: 18438 expressionEndOffset: 18440 I am unsure as to how I can trace or otherwise diagnose the cause, as this seems to be impossible to catch using the usual Java tools (try/ catch). Any suggestions? Regards, Anders -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
Well, using Safari I can now spot the place where the exception is thrown in the generated JavaScript, but I have no way to relate that to the Java code that I put into the GWT compiler. Any clues as to how I do that? Regard, Anders -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
I finally bit the bullet, and started commenting out huge chunks of my code, and running the application to see if that got rid of the problem... After a few hours of this, I finally narrowed it down to the following (and similar) line of code: daygrid.getColumnFormatter().setWidth(col, 0px); As soon as I set this to 1px rather than 0px the javascript error went away. for you dduck, the way forward would be to do as leduque suggests above and set the compile time flag for style to detailed and that should give you a much better idea where the error is, you might find the following link useful: http://code.google.com/webtoolkit/doc/1.6/FAQ_DebuggingAndCompiling.html#Why_is_my_GWT-generated_JavaScript_gibberish? Id still like to know how to set this setting via eclipse, which im sure is very simple for someone who knows! Thanks, John On Jan 21, 2:14 pm, dduck anders.johansen.a...@gmail.com wrote: Well, using Safari I can now spot the place where the exception is thrown in the generated JavaScript, but I have no way to relate that to the Java code that I put into the GWT compiler. Any clues as to how I do that? Regard, Anders -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
When you press the compile button in Eclipse, there is a drop down menu called: Output Style. One of the options there is the detailed. I suppose that would do the trick ... 2010/1/21 John V Denley johnvden...@googlemail.com Id still like to know how to set this setting via eclipse, which im sure is very simple for someone who knows! Thanks, John -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
I dont get that option, where is this compile button you refer to? I always use the run as, there is a Compile GWT project under that, but it doesnt give me any options, it just starts compiling! Incidentally, I have now deployed this fixed for IE version, and online, it doesnt work, even though locally it works fine! sigh. 2010/1/21 g p ghost...@gmail.com When you press the compile button in Eclipse, there is a drop down menu called: Output Style. One of the options there is the detailed. I suppose that would do the trick ... 2010/1/21 John V Denley johnvden...@googlemail.com Id still like to know how to set this setting via eclipse, which im sure is very simple for someone who knows! Thanks, John -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.comgoogle-web-toolkit%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: What causes com.google.gwt.core.client.JavaScriptException, and how to trace it?
Y(ou'll probably only have this kind of exception in javascript compiled app, so you won't be able to use hosted/devmode to inspect it. I'd probably compile the application with style=DETAILED and use tools like firebug (Firefox) or webkit developer tools (chrome/safari) to debug that. Of course, if this really is a big application, it may take some resources to trace into DETAILED javascript (I know for example Firebug has some problems with really big js files). -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
