Integer#&, #| and #^ read the right-hand operand with mrb_integer()
without checking its type. For a Float (or any non-Integer) this reads an
unrelated union field and returns a garbage value instead of raising, as
CRuby does. Raise TypeError via mrb_int_noconv() when the operand is not
an Integer. Bigint operands are still handled before this point, and the
shift operators keep coercing their width as before.
Co-authored-by: Claude <noreply@anthropic.com>
Yukihiro "Matz" Matsumoto
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