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Segmentation fault using "survival" package (PR#2320)

2 messages · Martin Maechler, Göran Broström

Original
Martin Maechler
# 
Jerome> Full_Name: Jerome Asselin Version: 1.6.1 OS: RedHat
    Jerome> Linux 7.2 Submission from: (NULL) (142.103.173.179)


    Jerome> Hello,

    Jerome> I get a segmentation fault when I run the following
    Jerome> code. I wouldn't expect meaningful results because
    Jerome> my response variable contains only missing values.
    Jerome> However, I would expect something like a regular
    Jerome> error (not a segmentation fault).

I confirm the problem (OS: a version of Redhat Linux, 1.6.1 patched)
running in "R -d gdb"
shows the place :
Program received signal SIGSEGV, Segmentation fault.
0x4027dee4 in coxfit2 (maxiter=0x8c9cc60, nusedx=0x8c9cc40, nvarx=0x8c9cc20, 
    time=0x0, status=0x0, covar2=0x0, offset=0x0, weights=0x0, strata=0x0, 
    means=0x8c85738, Rf_beta=0x8c85710, u=0x8c856e8, imat2=0x8c856c0, 
    loglik=0x8cb3dd0, flag=0x8c9cc00, work=0x8b4ef10, eps=0x8c85698, 
    tol_chol=0x8c85670, sctest=0x8c85648) at coxfit2.c:116
116	coxfit2.c: No such file or directory.
	in coxfit2.c

--
Martin
Göran Broström
#
On Mon, 25 Nov 2002 maechler@stat.math.ethz.ch wrote:

            

      
      
      
    

        

      
      
    

        
The survival package obviously lacks a few basic sanity checks, some of
which I have communicated to its R maintainer Thomas L. For instance, data
sets without events used to crash R in earlier versions.

The best advise for now is to check your data before using survival.

 ---
 Göran Broström                    tel: +46 90 786 5223
 Department of Statistics          fax: +46 90 786 6614
 Umeå University                   http://www.stat.umu.se/egna/gb/
 SE-90187 Umeå, Sweden             e-mail: gb@stat.umu.se