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Copied warning message from cherry-picked commit

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Denton Liu 2016-06-01 13:59:16 -04:00
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commit 1f19b93836
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docs/units-and-global-variables.rst
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@ -124,9 +124,10 @@ Address Related
For more information, see the section on :ref:`address`.
.. warning::
Since it is possible for calls to ``send`` to fail, such as
if there are insufficient funds, it is good practice to
check the return value whenever calling ``send``.
There are some dangers in using ``send``: The transfer fails if the call stack depth is at 1023
(this can always be forced by the caller) and it also fails if the recipient runs out of gas. So in order
to make safe Ether transfers, always check the return value of ``send`` or even better:
Use a pattern where the recipient withdraws the money.
.. index:: this, selfdestruct