[Issue 12170] sum(double[]) is not pure nothrow

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12170

--- Comment #6 from monarchdodra at gmail.com ---
Yeah, Kenji recently implemented inference for recursive functions.

See also: https://github.com/D-Programming-Language/phobos/pull/2075

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