cygwin64 process substitution: known bug?

[Gregory M. Turner]

On my cygwin64, all bash process substitutions fail:

$ ls -l <(echo foo)
lrwxrwxrwx 1 greg None 0 Apr  7 13:20 /dev/fd/63 -> pipe:[656]

$ cat <(echo foo)
cat: /dev/fd/63: No such file or directory

Here's an strace: http://pastebin.com/KS9766Vv

Anyone know what's going on?  I don't have a cygwin64 kernel/libc build 
tree, yet, but, if this merits further investigation, I suppose it's as 
good an excuse as any to build one, as this is messing up my play-time.

--
gmt


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