[Debian-med-packaging] Bug#798693: opensurgsim: FTBFS on i386 and powerpc: unaligned Eigen arrays

[Aaron M. Ucko]

Source: opensurgsim
Version: 0.6.0-2
Severity: serious
Justification: fails to build from source

The i386 and powerpc builds of opensurgsim both failed because many
tests reported errors of the form 

SurgSim*Test: /usr/include/eigen3/Eigen/src/Core/DenseStorage.h:86: Eigen::internal::plain_array<T, Size, MatrixOrArrayOptions, 16>::plain_array() [with T = double; int Size = 16; int MatrixOrArrayOptions = 0]: Assertion `(reinterpret_cast<size_t>(eigen_unaligned_array_assert_workaround_gcc47(array)) & 0xf) == 0 && "this assertion is explained here: " "http://eigen.tuxfamily.org/dox-devel/group__TopicUnalignedArrayAssert.html" " **** READ THIS WEB PAGE !!! ****"' failed.

(The powerpc build also encountered an unrelated test suite error,
which I'll report separately.)

Could you please take a look?  Per the error message, you may find
http://eigen.tuxfamily.org/dox-devel/group__TopicUnalignedArrayAssert.html
helpful.

Thanks!