After looking more, I think that trying to patch ia32 sNaN's into the heap
exposes fragile behavior, including compiler version dependencies. Seems
much
cleaner to do this on the end target after de-ser.
New CL: https://chromiumcodereview.appspot.com/10093007/, properly tested
this
time.
If you feel strongly otherwise I have another (un-published) CL here:
https://chromiumcodereview.appspot.com/10093008, but I am pretty
uncomfortable
with this one, as it's a workaround for a bad fix, IMO. But it does work.
https://chromiumcodereview.appspot.com/9910029/
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