reading from pipes fails if working directory is on a removable drive

[mihau]

hello,

came across this today on a fresh (2 days old) installation of cygwin x86

$ cat test.txt | head
       3 [main] head (3348) C:\tools\cygwin\bin\head.exe: *** fatal error - MapViewOfFileEx '(null)'(0x5DC), Win32 error 6.  Terminating.
Segmentation fault

reading from pipes works fine if working directory is a local drive or a UNC path,
but this happens if the working directory is removable drive. I tried with/on various
devices and it happens on all removable drives, regardless of the filesystem (NTFS or FAT32)

also, 'head' is just an example; the same error comes up when trying to use grep,
sed or gawk (haven't tested with others yet).

does anybody know what could be causing this?

thank you,
Michael

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