1.9 e$B$G$Oe(B $? e$B$,%9%l%C%I%9%3!<%W$G$J$/$J$C$F$$$k$h$&$G$9!#e(B
e$B0J2<$N$h$&$K!"B>$N%9%l%C%I$GF0$+$7$?%3%^%s%I$N7k2L$,e(B $? e$B$KI=e(B
e$B$l$^$9!#e(B
% ./ruby -ve ’
t = Thread.new { system(“false”) }
p $?
t.join
p $?
’
ruby 1.9.0 (2008-07-09 revision 17977) [i686-linux]
false
#<Process::Status: pid 11679 exit 1>
1.8 e$B$G$Oe(B $? e$B$OJQ2=$7$^$;$s!#e(B
% ruby-1.8 -ve ’
t = Thread.new { system(“false”) }
p $?
t.join
p $?
’
ruby 1.8.7 (2008-07-10 revision 17572) [i686-linux]
nil
nil
e$B$"$H!"$D$$$G$K$$$&$H!"e(B1.9 e$B$G$Oe(B $? e$B$N=i4|CM$,e(B 1.8
e$B$H0[$J$je(B
false e$B$G$9!#e(B