Ruby

merge revision(s) 54cad3123a07583c90e85bcfc55ebd87124c1250: [Backport #19004]

    [Bug #19004] `Complex.polar` handles complex singular `abs` argument

    `Complex.polar` accepts Complex values as arguments for the polar form as long
    as the value of the complex has no imaginary part (ie it is 'real'). In
    `f_complex_polar` this is handled by extracting the real part of the arguments.
    However in the case `polar` is called with only a single argument, the absolute
    value (abs), then the Complex is created without applying a check on the type
    of abs, meaning it is possible to create a Complex where the real part is itself
    an instance of a Complex. This change removes the short circuit for the single
    argument case meaning the real part extraction is performed correctly
    (by f_complex_polar).

    Also adds an example to `spec/ruby/core/complex/polar_spec.rb` to check that
    the real part of a complex argument is correctly extracted and used in the
    resulting Complex real and imaginary parts.
    ---
     complex.c                            | 13 ++++++-------
     spec/ruby/core/complex/polar_spec.rb | 16 ++++++++++++++++
     2 files changed, 22 insertions(+), 7 deletions(-)