Module that causes GHC-7.8 to exhaust memory when -O2 is on

[David Fox]

The repository at http://src.seereason.com/o2bug contains a package that
causes GHC-7.8.1 (rc2?) to exhaust 16GB of RAM and die when the -O2 flag is
turned on.  I haven't been able to simplify it very much, almost any change
to JSON.Render causes it to start working properly.  I did get it to fail
using only packages available in hackage.  Just thought I should let folks
know about this issue.  Let me know if it fails to fail.

Maybe someone who can log in could put this in trac.
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