R devel - May 2005 - Segmentation violation in eval.c (R 2.1.0) (PR#7893)

Hi,

I get a segmentation fault in eval.c:
do_set (call=0x8ce166c, op=0x82b43b8, args=0x8ce1650, rho=0x8acf218)
    at eval.c:1309
1309                switch (NAMED(s)) {

The instruction is
0x080becf1 <do_set+177>:        movzbl (%eax),%edx

and %eax contains a non-accessible address
(gdb) x/x $eax
0x4a5bf008:     Cannot access memory at address 0x4a5bf008
in another try it was
(gdb) x/x $eax
0x59a5a008:     Cannot access memory at address 0x59a5a008

This segmentation fault occurs reproducible in a long simulation script.
However, I don't know the place in the .R file. I would like to isolate
the bug but don't know how. I attached the gdb session. I use R 2.1.0 on
a Linux machine (Athlon64). Maybe a package that I wrote and use for the
simulation clobbers some memory (although I already added some sanity
checks). But please let me know when you hear about this bug another
time (or have an idea how to debug this or have a solution).

Thank you,

Andreas

-- 
Andreas Westfeld, 0432 01CC F511 9E2B 0B57 5993 0B22 98F8 4AD8 EEEA
<westfeld@inf.tu-dresden.de> http://www.inf.tu-dresden.de/~aw4
TU Dresden Fakult?t Informatik, Institut f?r Systemarchitektur
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