Multiplication of complex conjugate numbers wrong in Octave 3.0.5 mingw32

[FélixB]

Hello,

I get an error when multiplying complex conjugate numbers (see example
below). The diagonal of the matrix should be real. I have not this error
with version 3.0.3 (MSVC).

octave:5> a = rand(10000,2)+j*rand(10000,2);
octave:6> imag(diag(a'*a))
ans =

  -2.6396e-014
  -2.2185e-014

Félix

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