I have a fairly simple test program that runs fine under 1.2 on MacOS
X 10.5 . When I recompile and run it under 1.3 (head of 1.3 branch) it
just hangs.
They are both built using --with-platform=contrib/platform/lanl/macosx-
dynamic. For 1.3, I've added --disable-io-romio.
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