[Rd] Help: R seg faults

[Prof Brian D Ripley]

On Tue, 11 Jul 2000, Jan Kreft wrote:

> Dear list,
> 
> I hope this is the right forum to ask. I have just downloaded and compiled
> R, but I get a segfault after I start R.

That segfault is from readline, not R itself.

> make, make test/check, went OK.
> 
> My system is
> linux-2.2.13
> glibc-2.1.3
> gcc 2.95.2
> R-1.1.0

and where did you get readline from? (Is this some Linux distribution?)

> Here is a backtrace from gdb:
> 
> (gdb) file /usr/local/lib/R/bin/R.bin
> Reading symbols from /usr/local/lib/R/bin/R.bin...done.
> (gdb) run
> Starting program: /usr/local/lib/R/bin/R.bin 
> 
> R : Copyright 2000, The R Development Core Team
> Version 1.1.0  (June 15, 2000)
> 
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type    "?license" or "?licence" for distribution details.
> 
> R is a collaborative project with many contributors.
> Type    "?contributors" for a list.
> 
> Type    "demo()" for some demos, "help()" for on-line help, or
>         "help.start()" for a HTML browser interface to help.
> Type    "q()" to quit R.
> 
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x400da7bc in _IO_fflush (fp=0x819ecd8) at iofflush.c:41
> 41            result = _IO_SYNC (fp) ? EOF : 0;
> (gdb) bt
> #0  0x400da7bc in _IO_fflush (fp=0x819ecd8) at iofflush.c:41
> #1  0x8122165 in rl_prep_terminal (meta_flag=0) at rltty.c:555
> #2  0x811cb08 in _rl_callback_newline () at callback.c:76
> #3  0x811cb4a in rl_callback_handler_install (prompt=0x4093c210 "> ", linefunc=0x80e8798 <readline_handler>) at callback.c:95
> #4  0x80e89b5 in Rstd_ReadConsole (prompt=0x4093c210 "> ", buf=0xbfffeedc "", len=1024, addtohistory=1) at ../../../R-1.1.0/src/unix/sys-std.c:357
> #5  0x80e6b2e in R_ReadConsole (prompt=0x4093c210 "> ", buf=0xbfffeedc "", len=1024, addtohistory=1) at ../../../R-1.1.0/src/unix/system.c:66
> #6  0x8097d78 in R_ReplConsole (rho=0x40296338, savestack=0, browselevel=0) at ../../../R-1.1.0/src/main/main.c:128
> #7  0x80985e2 in run_Rmainloop () at ../../../R-1.1.0/src/main/main.c:454
> #8  0x8098620 in Rf_mainloop () at ../../../R-1.1.0/src/main/main.c:468
> #9  0x80e715a in main (ac=0, av=0xbffff7f4) at ../../../R-1.1.0/src/unix/system.c:222

Thanks for the detail, which enables me to guess at how to solve this....

Suggestions:

(1) configure with --without-readline and see if that works (it
should, since make check does).  You `just' lose the command-line history.

(2) Compile the current readline sources yourself and use that, building
from scratch. In so far as your spec looks like RH6.2 with gcc-2.95.2 added
(from memory), that has a good chance to work as it did for me. It might
matter that readline is compiled with the same compiler as R.  (I know it
should not, but RH6.2 seems to have some problems making dynamic libraries
with the supplied egcs.)


-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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