R devel - Nov 1999 - continuous key press results in core dump (PR#331)

I  encountered this today (I admit it is a result of downright abuse)

Segmentation fault under abnormal conditions (as when stupid finger
accidentally leaned on key): 

at 128 (at least by my count) "continuous" (zzzzzzzzz... or
123qwertyuio...)
characters but NOT when enclosed in " ", and not if numbers. 
>
12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678
[1] 1.234568e+157
>
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Segmentation fault (core dumped)

Again, many thanks and best wishes,

Rashid
--please do not edit the information below--

Version:
 platform = i586-unknown-linux
 arch = i586
 os = linux
 system = i586, linux
 status = Release
 major = 0
 minor = 65.1
 year = 1999
 month = October
 day = 07
 language = R

Search Path:
 .GlobalEnv, Autoloads, Autoloads, package:base

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rnassar@duke.edu writes:
> I  encountered this today (I admit it is a result of downright abuse)
> 
> Segmentation fault under abnormal conditions (as when stupid finger
> accidentally leaned on key): 
...which is exactly why this kind of fault mustn't happen.
> at 128 (at least by my count) "continuous" (zzzzzzzzz... or
123qwertyuio...)
> characters but NOT when enclosed in " ", and not if numbers. 
> 
> >
12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678
> [1] 1.234568e+157
> >
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
> Segmentation fault (core dumped)
Yup, in dstruct.c we have

static int ddVal(SEXP name)
{
    char buf[128], *endp, *val;
    int rval;

    strcpy(buf, CHAR(name));

..which at the very least has to have a str*n*cpy in order not to
corrupt the stack if CHAR(name) is too large. Or perhaps better:
allocate buf explicitly instead of via a stack variable.

Not sure I'll be able to get it fixed tonight though.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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