e$B0J2<$N$h$&$K!“e(BThread.current.key? nil e$B$N5sF0$,%9%l%C%IJQ?t$,e(B
e$B$”$k$+$I$&$+$GJQ$o$j$^$9!#e(B
% ./ruby -ve ’
p Thread.current.key? nil
Thread.current[:a] = 1
p Thread.current.key? nil
’
ruby 1.9.0 (2008-05-02 revision 16284) [i686-linux]
false
-e:4:in key?': nil is not a symbol (TypeError) from -e:4:in’