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bug #890: extract_data might returns 0x0 thus breaking aliasing detection

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Gael Guennebaud 2014-10-10 16:42:32 +02:00
parent 7d5e16c733
commit aadbfe78c2
1 changed files with 4 additions and 1 deletions
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5
Eigen/src/Core/PermutationMatrix.h
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@ -555,7 +555,10 @@ struct permut_matrix_product_retval
const Index n = Side==OnTheLeft ? rows() : cols();
// FIXME we need an is_same for expression that is not sensitive to constness. For instance
// is_same_xpr<Block<const Matrix>, Block<Matrix> >::value should be true.
if(is_same<MatrixTypeNestedCleaned,Dest>::value && extract_data(dst) == extract_data(m_matrix))
if( is_same<MatrixTypeNestedCleaned,Dest>::value
&& blas_traits<MatrixTypeNestedCleaned>::HasUsableDirectAccess
&& blas_traits<Dest>::HasUsableDirectAccess
&& extract_data(dst) == extract_data(m_matrix))
{
// apply the permutation inplace
Matrix<bool,PermutationType::RowsAtCompileTime,1,0,PermutationType::MaxRowsAtCompileTime> mask(m_permutation.size());