display from stdin always creates temp files in current directory?

[djbcmp]

Whenever I display an image from stdin, like this:

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$ cat myfile.jpg | display -

"display" creates temp files in the current directory, no matter how I set ImageMagick's environment variables MAGICK_TMPDIR, MAGICK_TEMPORARY_PATH, etc. Is there a way to cause these temp files to be created in some other directory?

The temp files have names like "magickh9EMwm". I can see them getting created by monitoring the directory:

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$ inotifywait -m -e create mydirectory

This is on Ubuntu 14.04. Version info:

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$ display --version
Version: ImageMagick 6.7.7-10 2014-03-06 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP  

[djbcmp]

Anybody have any ideas?

[djbcmp]

I have posted this as a bug: viewtopic.php?f=3&t=27687.