[Rcpp-devel] Possible regression in R-3.2.3 or Rcpp 0.12.3

[Dirk Eddelbuettel]

On 28 January 2016 at 21:47, Paul Johnson wrote:
| Thanks.
| 
| On Thu, Jan 28, 2016 at 2:42 PM, Dirk Eddelbuettel <edd at debian.org> wrote:
| >
| > Paul,
| >
| > I can reproduce the segfault on Ubuntu 15.10, "everything current".
| > Definitely a valid bug report, though a 30mb xlsx may not qualify as
| > minimal.
| >
| I'm glad I did not attach it to an email, then :)
| 
| The data xlsx provided by the client is about 2 times as big, I had a
| GRA whittled it down for your entertainment.
| 
| If we whittle xlsx file down to a few lines, it does not seg fault, apparently.
| 
| I'm going crazy trying to downgrade R in Ubuntu see where that leads.
| I was using 3.2.2 until a couple of days ago and I never saw a hint of
| trouble from Rcpp or openxlsx.

Sorry that is so frustrating, I know.  Maybe using clang++ can help as it did
for KK on OS X.  (Though clang++ remains frustrating on Ubuntu as you have to
fiddle with -I... switches.)

Dirk
| 
| > I won't have time to look at this for a while though so if you find that
| > downgrading helps that may be your best bet.
| >
| > Thanks for the report.  I am so used to simple segfaults from ABI mixings
| > (g++-5.* will do that for you...) that I called this wrongly at first.
| >
| > Dirk
| >
| > /tmp/pj/openxlsx_failure$ Rscript
| > Reproducible_openxlsx_failure.R
| > R version 3.2.3 (2015-12-10)
| > Platform: x86_64-pc-linux-gnu (64-bit)
| > Running under: Ubuntu 15.10
| >
| > locale:
| >  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
| >  LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
| >  LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=en_US.UTF-8
| >   [8] LC_NAME=C                  LC_ADDRESS=C               LC_TELEPHONE=C
| >  LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
| >
| > attached base packages:
| > [1] stats     graphics  grDevices utils     datasets  base
| >
| > other attached packages:
| > [1] openxlsx_3.0.0
| >
| > loaded via a namespace (and not attached):
| > [1] Rcpp_0.12.3.1 methods_3.2.3
| >
| >  *** caught segfault ***
| >  address 0x7fd5b83d8038, cause 'memory not mapped'
| >
| > Traceback:
| >  1: .Call("openxlsx_readWorkbook", v, r, string_refs, isDate, nRows,
| >  colNames, skipEmptyRows, origin, clean_names, PACKAGE = "openxlsx")
| >  2: read.xlsx.default("Failure_to_Import.xlsx", colNames = TRUE)
| >  3: read.xlsx("Failure_to_Import.xlsx", colNames = TRUE)
| > aborting ...
| >
| >
| > --
| > http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
| 
| 
| 
| -- 
| Paul E. Johnson
| Professor, Political Science        Director
| 1541 Lilac Lane, Room 504      Center for Research Methods
| University of Kansas                 University of Kansas
| http://pj.freefaculty.org              http://crmda.ku.edu

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