Bug still present on perl 5.8.7 cygwin-thread-multi-64int / nt4

$ perl test.pl
In BLOCK1, $ENV{WANGO} = [undef]
In BLOCK2, $ENV{WANGO} = [FOTANGO]
In BLOCK3, $ENV{WANGO} = [FOTANGO]
 ... BUT IT SHOULD BE undef!
$ uname -a
CYGWIN_NT-5.0 reini 1.5.19s(0.137/4/2) 20050814 16:02:26 i686 unknown
unknown Cygwin

I'll report at the cygwin list