tzset crash in 64-bit Cygwin

[Ken Brown]

$ uname -a
CYGWIN_NT-6.1 fiona 1.7.18(0.263/5/3) 2013-03-22 15:00 x86_64 Cygwin

$ tzset

[no output]

$ cat tzset.exe.stackdump
Exception: STATUS_ACCESS_VIOLATION at rip=00100401B13
rax=00000001004071B0 rbx=000000000022A490 rcx=00000001004071B0
rdx=0000000000000020 rsi=0000000100402C08 rdi=000000000000007B
r8 =0000000000000000 r9 =0000000000000053 r10=00000000002B084C
r11=0000000000000000 r12=000000000022A470 r13=0000000100402080
r14=0000000000000000 r15=0000000000000000
rbp=000000000000007B rsp=000000000022A400
program=C:\cygwin64a\bin\tzset.exe, pid 16124, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B

Ken