[Issue 20278] ICE: calling std.math.sqrt with int cast to double

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20278

--- Comment #6 from hsteoh at quickfur.ath.cx ---
Writing the return statement as:
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return sqrt(cast(double)(x*x + y));
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makes the problem go away. Parenthesizing (x*x) also makes the problem go away.
Somehow something goes wrong when the cast operator is applied only to the
first element of the product x*x.  The +y appears to be necessary, since
removing that also makes the error go away.

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