[Rcpp-devel] Error in RCpp and Wt toolkit

[John Robson]

Hey Dirk,

$ ./boostEx
Hello, world from main()
Hello, world from use()
Hello, world from use()
At end value is 2

RInside/inst/examples/threads Works perfectly.

I also tried Wt example in other 2 machines with Ubuntu 12.04 and Wt
3.2.3 and I get the same error in both...

Your http://dirk.eddelbuettel.com:8088 is working awesome!!!  Maybe the
problem is with my version.

Currently version is 3.3.0-rc4.  In few days version 3.3.0 will be
released and I'll test again.

But I'm using GDB and there is none useful information about what is
that problem, then will be hard to get it.

Thank you again.

On 03/29/2013 09:32 PM, Dirk Eddelbuettel wrote:
> 
> On 29 March 2013 at 21:11, John Robson wrote:
> | Hi Dirk, thank for your support.
> | 
> | I'm using:
> | Linux 3.2.0-4-686-pae #1 SMP Debian 3.2.39-2 i686 GNU/Linux
> | Debian 7.0 wheezy
> | G++: 4.7.2
> | STL: 4.7.2
> | BOOST: 104900
> | Wt: 3.2.3
> | R version 2.15.1 (2012-06-22)
> | Platform: i486-pc-linux-gnu (32-bit)
> | RInside_0.2.10
> | Rcpp_0.10.3
> 
> Looks good, and is always identical at my end. With Ubuntu I have Wt 3.2.1
> but I am not sure how / why that would matter.
> 
> | Rcpp for Qt works perfectly, but as I said, for Wt, after running, the
> | system throw an segmentation error.
> | 
> | If I comment line 171 [R_.parseEvalQ(cmd);]; I not get crash after
> | running, but not generate image.
> 
> Sure. 
> 
> It's the invocation of R that creates the issue, and creates the image. 
> 
> You could try the code in examples/threads/ which is close in spirit.  If
> that works, and if Qt works, then it may be Wt, but you will have to debug at
> your end -- as it works here.
> 
> Dirk
> 
> | 
> | On 03/29/2013 07:41 PM, Dirk Eddelbuettel wrote:
> | > 
> | > On 29 March 2013 at 19:24, John Robson wrote:
> | > | The example:
> | > | http://dirk.eddelbuettel.com/blog/2011/11/30/#rinside_and_wt
> | > | 
> | > | >From the code:
> | > | https://github.com/JohnRobson/Wt-Tests/blob/master/RInside/wtdensity.cpp
> | > | 
> | > | After running, the site appears OK: http://imagebin.org/252132
> | > | 
> | > | But immediately a segmentation error is throw:
> | > | http://paste.ubuntu.com/5659723/
> | > | 
> | > | Line 171 Cause this error.
> | > | 
> | > | 171  R_.parseEvalQ(cmd); // evaluate command -- generates new density plot
> | > | 
> | > | What I need to do to fix this error?
> | > 
> | > For starters, please learn to write meaningful bug reports. Yours is concise
> | > (a plus) but I don't have time to chase around different websites.
> | > 
> | > On my _stock Ubuntu 12.10_ I just rebuilt RInside (both 0.2.10 and the SVN
> | > version 0.2.10.1 I have here), and run make inside examples/wt -- and it
> | > works just fine in both cases. Try
> | > 
> | >    http://dirk.eddelbuettel.com:8088 
> | > 
> | > to play with it.  
> | > 
> | > You need to tell us (at a minimum) what OS and release, what Rcpp version,
> | > what RInside version, possibly what Wt version etc pp.  I reckon that the
> | > code is fine, but that something is amiss from your build.