Hi,

I have now gone through the other 'patch' releases of 2.4 and discovered that The error appeared in 2.4.13.  In other words up to 2.4.12 the code I provided yesterday worked and from then on it has failed to compile always producing the error I first reported on the same line of code.


Hope the helps in locating the problem.


Jon




Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
j.kerridge@napier.ac.uk
http://www.soc.napier.ac.uk/~cs10/
 

From: Kerridge, Jon
Sent: 15 April 2018 16:55:13
To: dev@groovy.apache.org
Subject: Re: Compiler bug
 

Hi,


I have run the tests again several times (at least 3).


I alternated between compiling with Groovy.2.4.10 and Groovy2.4.15


With 2.4.10 the module compiled without fail and the code highlighted before worked as expected.


With 2.4.15 the module produced the same error as first reported and that included following mg's advice and doing several 'build's of the module but it failed every time in the same way.


I guess the thing to do is download the intermediate version to find out where there was a change 2.4.n and 2.4.n+1 to see where the change of version causes a problem.


I will now start that exercise.


Jon



Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
 

From: Kerridge, Jon <J.Kerridge@napier.ac.uk>
Sent: 13 April 2018 20:21:58
To: dev@groovy.apache.org
Subject: Re: Compiler bug
 

Hi,

Following mg's advice have compleltly built the code again from scratch.


I had installed 2.4.10 and the code that was failing before is now working and I was able to run it.  However I did not have to do build more than once for each component.  The build in total requires the compilation of 6 modules.


So I do not know now whether it is a bug or just a problem with Intellij.  I will reinstall 2.4.15 and see if I can build it again and get it to work.


Thanks for your time and trouble
Jon

Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
 



From: MG <mgbiz@arscreat.com>
Sent: 13 April 2018 17:52
To: dev@groovy.apache.org; Kerridge, Jon
Subject: Re: Compiler bug
 
To be clear: You have to repeatedly execute "build" - not "rebuild". While it might seem logical that, if anything, "rebuild" fixes the problem, for my that was never the case: "rebuild" just took a long time, then failed with the same error.
In my case, the problem always stays away for some time once the build works again.

I would try my suggestion first, since it will take no more than the time it takes for you to try to build your project several times. On the ther hand, if you have run into the same indeterministic problem, you will not be able to "find the point at which the code worked" - or, to be more precise, you will only think that you have found it, but it might just have worked by accident. In the beginning I did also not believe that the problem was indeterministic, since I kept changing thing until the build "worked again" - until I finally realized, that just clicking "build" several times in a row actually could make the build work (Note: My build does not have any steps outside of Groovy compilation over multiple modules).

mg


On 13.04.2018 17:32, Kerridge, Jon wrote:

Hi,

Thanks for the advice, will still try to see if I can find the point at which the code worked and is no longer working but will bear in mind your comment.


It looks as though moving to Intellij mught not have been the shangrilar it was made out to be!!


Jon




Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
 

From: MG <mgbiz@arscreat.com>
Sent: 13 April 2018 13:51:13
To: dev@groovy.apache.org; Kerridge, Jon
Subject: Re: Compiler bug
 
Hi John,

I have bee using IntelliJ for years and have had a non-deterministic build problem for about the same time span, where the Groovy compiler throws on my code overriding a method in a child class with an incompatible return type. Only my code is correct, and the problem dissappears every time if I rebuild the project multiple times (without any changes between builds). Afair IntelliJ introduced some kind of caching mechanism to speed up Groovy builds some time back, and I assume this is the cause of the problem.

So it might sound odd, but I would suggest you try rebuilding your project multiple times in a row, with a little bit of delay between builds, if possible through different build paths (e.g. build a submodule other modules depend on first, etc), to see if the build suddenly works in your case too.

Cheers,
mg
 

On 13.04.2018 14:27, Kerridge, Jon wrote:

Hi,


This becomes problematic as the containing class is part of a much larger system.  I am building a a Groovy Parallel Patterns Library and this is just one of the demos of the library I am working on.  I have had the code working in an Eclipse envrionment with an earlier release of 2.4 probably around 10 or 11.


I have now moved to Intellij and this has thrown up the problem.


I will download a previous release of 2.4.n and see if I can get the code to work and that may then help you to identify the problem.


I have been doing a major revision of my codebase moving from Eclipse/Mercurial/ Bitbucket to Intellij/Github and this has thrown up this problem.


Jon




Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
 

From: Paul King <paulk@asert.com.au>
Sent: 13 April 2018 11:20:16
To: dev@groovy.apache.org
Subject: Re: Compiler bug
 

Not sure what happened to the formatting - here it is again:

class QueensBase {
  int N = 2

  double doFitness(List <Integer> board) {
    List <Integer> leftDiagonal = new ArrayList(2*N)
    List <Integer> rightDiagonal = new ArrayList(2*N)
    double sum = 0.0D

    for ( i in 1 .. 2*N) {
        leftDiagonal[i] = 0
        rightDiagonal[i] = 0
    }
    for ( i in 1 .. N) {
        leftDiagonal[i+board[i]-1]++
        rightDiagonal[N-i+board[i]]++
    }
    for ( i in 1 .. ((2*N) - 1)) {
        int counter = 0
        if ( leftDiagonal[i] > 1)
            counter += leftDiagonal[i] - 1
        if ( rightDiagonal[i] > 1)
            counter += rightDiagonal[i] - 1
        sum += counter / (N - Math.abs(i-N))
    }
    // target fitness is 0.0
    // sum can be negative so return absolute value
    return Math.abs(sum)
  }
}

println new QueensBase().doFitness(1..16)


On Fri, Apr 13, 2018 at 8:18 PM, Paul King <paulk@asert.com.au> wrote:
I tried this script:

class QueensBase {
  int N = 2

  double doFitness(List <Integer> board) {
    List <Integer> leftDiagonal = new ArrayList(2*N)
    List <Integer> rightDiagonal = new ArrayList(2*N)
    double sum = 0.0D

    for ( i in 1 .. 2*N) {
        leftDiagonal[i] = 0
        rightDiagonal[i] = 0
    }
    for ( i in 1 .. N) {
        leftDiagonal[i+board[i]-1]++
        rightDiagonal[N-i+board[i]]++
    }
    for ( i in 1 .. ((2*N) - 1)) {
        int counter = 0
        if ( leftDiagonal[i] > 1)
            counter += leftDiagonal[i] - 1
        if ( rightDiagonal[i] > 1)
            counter += rightDiagonal[i] - 1
        sum += counter / (N - Math.abs(i-N))
    }
    // target fitness is 0.0
    // sum can be negative so return absolute value
    return Math.abs(sum)
  }
}

println new QueensBase().doFitness(1..16)

It worked for me in the Groovy Web Console, Intellij IDEA 2017.3.5 pointing to 2.4.15, and the GroovyConsole for 2.4.15 and 2.3.0.

Perhaps we need a bigger sample to track down your issue.

Cheers, Paul.


On Fri, Apr 13, 2018 at 7:39 PM, Kerridge, Jon <J.Kerridge@napier.ac.uk> wrote:

Daniel,


Thanks for getting back to me so quickly.


I have converted to groovy2.4.15 and the same error occurs.  I am running under Intellij IDE and had downloaded the sdk bundle.


Jon




Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
 
0131 455 2777
 

From: Daniel.Sun <sunlan@apache.org>
Sent: 12 April 2018 18:22:39
To: dev@groovy.incubator.apache.org
Subject: Re: Compiler bug
 
Please try Groovy 2.4.15.

Cheers,
Daniel.Sun



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