Bug 21370 – Missing module in core.stdcpp

In pull request #2723 of druntime, a reference to a module in core.stdcpp package was added without the actual module. https://github.com/dlang/druntime/pull/2723/files#diff-6058714bca9002876fe6184b5b2c2f39b68b490de88442b6619f84e304e39e41R132 Using core.stdcpp.memory : unique_ptr on a linux build will cause the compiler to error on the missing module. Example code that will cause error: ``` import core.stdcpp.memory : unique_ptr; void main() { alias up = unique_ptr!char; } ```

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