[Issue 24736] New: core.atomic is not work with struct that has template parameter list and function pointer (-preview=all)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24736

          Issue ID: 24736
           Summary: core.atomic is not work with struct that has template
                    parameter list and function pointer (-preview=all)
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: rayerd.wiz at gmail.com

import core.atomic; // Compile within -preview=all

enum VARS_AFTER_FP = true;

synchronized shared class A
{
        static void proc() {}

        void fn(ARGS...)(ARGS args)
        {
                static struct S
                {
                        static if (VARS_AFTER_FP)
                        {
                                void function() fp;
                                ARGS vars;
                        }
                        else
                        {
                                ARGS vars;
                                void function() fp;
                        }
                }
                S s;
                s.fp.atomicStore(&proc);
                static foreach (i, e; args)
                {
                        s.vars[i].atomicStore(e.atomicLoad());
                }
        }
}

void main()
{
        auto a = new A;
        a.fn(1); // OK
        a.fn(2, "str"); // Runtime error when VARS_AFTER_FP is false.
        a.fn("str", 3); // Runtime error when VARS_AFTER_FP is true.
}

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