rlvm_unittests fails on recMulti.1

[jbeich]

This happes both with clang36/libc++, gcc5/libc++ but not with gcc5/libstdc++. My copy of libc++ is at r224926 + r228344/r233552 bugfixes. I wonder if the issue affects OS X as well.

unknown file: Failure
C++ exception with description "ExpressionPiece::GetIntegerValue() invalid on object of type 2" thrown in the test body.
[  FAILED  ] MediumObjectPoromotion/PromotionTest.BgLayerPromotion/49, where GetParam() = ("recMulti", 1, (3, "\"file\"$\xFF\0\0\0\0$\xFF\xFF\0\0\0"), true) (1 ms)

Workaround.

[eglaysher]

Couldn't reproduce that with g++ 4.9.2-10ubuntu13 (I assume libstdc++), or with Apple LLVM clang-600.0.57 (I assume libc++).

If you're looking for a short term workaround, revering b1321e4, ea47857 and 727f68b might help. And if it doesn't, that's would be really interesting. The three patches above were memory optimizations, and that exception is from that recent code.