mbostock/topojson — pull request #205 by jasondavies (2014-10-21 00:07:44+00:00)
Title: Fix topojson-command-test on Linux.

It looks like Node’s child processes cannot always open /dev/stdout, at
least on Linux. An error such as "UNKNOWN" or "ENXIO" is thrown.

This thread may be related:

One workaround is to insert a pipe to cat, which allows the child
process to open /dev/stdout, and pipe to cat. Then the output of cat
can be read by the test.

Fixes #204.