[Rcpp-devel] Error in RCpp and Wt toolkit

[Dirk Eddelbuettel]

On 29 March 2013 at 22:04, John Robson wrote:
| 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.

Hm. That would suggest that the threating / mutex issues are fine at the
RInside / R level.  That would leave Wt as the likely suspect.
 
| 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...

I can assure you that this also worked on Ubuntu 12.04 with 'default
everything' eg whatever Wt version we had then
 
| Your http://dirk.eddelbuettel.com:8088 is working awesome!!!  Maybe the
| problem is with my version.

Could well be.
 
| 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.

That's the challenge. Good luck.

Dirk
 
| 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.
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-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com