[io_rewiring] the second test in t/op/interp.t looks bogus to me. It was trying to readline from stdout. Previous IO implementation didn't check that the handle was readable, and would fail silently. The new implementation throws an exception if we try to read from a non-readable pmc.
[io_rewiring] the second test in t/op/interp.t looks bogus to me. It was trying to readline from stdout. Previous IO implementation didn't check that the handle was readable, and would fail silently. The new implementation throws an exception if we try to read from a non-readable pmc.

git-svn-id: ab052325e6ff0215049859dfe087640a330fcaf7@39440 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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