R devel - Nov 2002 - Segmentation fault using "survival" package (PR#2320)

Full_Name: Jerome Asselin
Version: 1.6.1
OS: RedHat Linux 7.2
Submission from: (NULL) (142.103.173.179)



Hello,

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


library(survival)

data <- structure(list(surv = structure(c(NA, NA, NA, 0,
0, 0), .Dim = c(3, 2), .Dimnames = list(NULL, c("time",
"status"
)), class = "Surv", type = "right"), x = c(-1, -1, -0.5)),
.Names = c("surv", "x"),row.names = c("1",
"2", "3"),
class = "data.frame")

coxph(surv ~ x,data=data)


Below is what I get when I run these commands from a freshly started R session.
This is always reproducible for me.

Sincerely,
Jerome Asselin
> library(survival)
>
> data <- structure(list(surv = structure(c(NA, NA, NA, 0,
+ 0, 0), .Dim = c(3, 2), .Dimnames = list(NULL, c("time",
"status"
+ )), class = "Surv", type = "right"), x = c(-1, -1, -0.5)),
+ .Names = c("surv", "x"),row.names = c("1",
"2", "3"),
+ class = "data.frame")
>
> coxph(surv ~ x,data=data)
Segmentation fault

>>>>> "Jerome" == Jerome Asselin
<jerome@hivnet.ubc.ca>
>>>>>     on Sat, 23 Nov 2002 00:51:51 +0100 (MET) writes:
    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 :
> coxph(surv ~ x, data=data)
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