吉田@TPJです．

sample の下の biorythm.rb ですが，
0.95c で 実行すると以下のように core dump してしまいます．

------------------------------------------------------------------------
% ../ruby ../sample/biorhythm.rb

Biorhythm (c) 1987-1994 V3.0

Birthday                          (YYYYMMDD) : 19680513
Date    [<RETURN> for Systemdate] (YYYYMMDD) :
Values for today or Graph  (v/g) [default g] :
Graph for how many days         [default 10] :
Floating exception (core dumped)
% dbx ../ruby core
Reading symbolic information for ../ruby
core file header read successfully
Reading symbolic information for rtld /usr/lib/ld.so.1
Reading symbolic information for /usr/lib/libm.so.1
Reading symbolic information for /usr/lib/libdl.so.1
Reading symbolic information for /usr/lib/libc.so.1
program terminated by signal FPE (integer divide by zero)
(dbx) w
=>[1] .div(0x0, 0x0, 0x9, 0x0, 0x0, 0x0), at 0xdf6d3e9c
  [2] fix_mul(0x1, 0x1f, 0x2c478, 0x2, 0x0, 0x0), at 0x2c4e4
  [3] rb_call(0x1, 0x1, 0x2a, 0x1, 0xdfffe5c0, 0x0), at 0x20440
  [4] rb_eval(0x1, 0x38, 0xdfffed50, 0x2, 0x0, 0x0), at 0x1dc10
  [5] rb_eval(0x982d0, 0x4, 0xffffffff, 0x0, 0x0, 0x8fa69), at 0x1e060
  [6] rb_eval(0x982b8, 0x1d0, 0xffffffff, 0x0, 0xf99, 0x0), at 0x1cec8
  [7] rb_call(0x98648, 0x0, 0x1670, 0x3, 0xdfffef20, 0x1), at 0x20a80
  [8] rb_eval(0x3, 0x38, 0xb0480, 0x1, 0xdffff178, 0x0), at 0x1dc10
  [9] rb_eval(0x94520, 0x4, 0x1050, 0x2, 0xdffff3c0, 0x1), at 0x1e060
  [10] rb_eval(0x93248, 0x4, 0x0, 0x47b8c, 0x3, 0x3a), at 0x1cec8
  [11] rb_eval(0x99788, 0x61c00, 0x0, 0x0, 0x0, 0x0), at 0x1cec8
  [12] Eval(0x0, 0x65c00, 0x0, 0x65c00, 0x0, 0xdf73daa0), at 0x1c798
  [13] ruby_run(0x2, 0xdffffa74, 0xdffffa80, 0x10000, 0x2, 0x0), at
0x1c860
  [14] main(0x2, 0xdffffa74, 0xdffffa80, 0x66518, 0x0, 0x0), at
0x2ac2c
% uname -a
SunOS 5.4 Generic_101945-27 sun4d sparc
------------------------------------------------------------------------

0.95a では動作しました．

--
吉田淳