Re: How to debug a crash that occurs only when draftCompile=false?

Thank you Vassilis, I didn't know about that option and this definitely helped me to identify and fix the problem.

I think the crash came from a GWT compiler bug but I found a workaround as explained below (I'm sharing in case this can help others).

That -style DETAILED compiler option is not as comfortable as the super dev mode but I could indeed at least recognize my java code within the javascript call stack, except for the very last call (the one causing the crash) which had actually nothing to do with the java caller code! GWT strangely jumped without explanation into a lambda expression that comes from another method of the same java class (perhaps with draftCompile=false, GWT tries to make some piece of code factorization including lambda expressions?). Anyway this lambda expression was translated into a javascript function that was called from 2 different places in the JS code whereas it is actually used only once in my java code, and that second place was in the caller code which was a complete compilation mistake. Hopefully when I rewrote my lamda expression using the old java 7 style in my java source code, GWT stopped doing that compilation mistake, so my app crash is now fixed :-)

Thanks for you help

Le lundi 5 mars 2018 22:03:36 UTC+1, Vassilis Virvilis a écrit :

I would try to compile with -style DETAILED

The generated js maps pretty well to the java code.

    Vassilis

On Mon, Mar 5, 2018 at 5:52 PM, Bruno Salmon <dev.s...@gmail.com> wrote:

hi,

I have a GWT application that runs ok when draftCompile=false but crashes when turning draftCompile to true (which is the case in production).

How can I fix that? Can it be related to something wrong in my java code source?

The browser reports an exception (a classical property access problem on an undefined object) and I have the exact JS line where this happens, but it's not helpful if I can't match this line with my java code.

The problem is that when I run the app in super dev mode to get the source maps, the crash doesn't occur anymore... Is it because the code server automatically make a draft compile ? Can we avoid that to get the same result as the production environment?

Thanks

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