[Issue 24317] New: pragma(inline, true) is wrongly applied when having nested functions

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24317

          Issue ID: 24317
           Summary: pragma(inline, true) is wrongly applied when having
                    nested functions
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: msnmancini at hotmail.com

The following code:
```d
pragma(inline, true)
void test()
{
        writeln(5);
    writeln("oops");
}

pragma(inline, true)
void test2()
{
    static int abc(int a){return a;}
        writeln(abc(5));
    writeln("oops");
}

void test3()
{
    pragma(inline, true) static int abc(int a){return a;}
        writeln(abc(5));
    writeln("oops");
}

void main()
{
    test();
    test2();
    test3();
}
```


Generates this tree when looking at the AST:
```d
pragma (inline, true)void test()
{
        writeln(5);
        writeln("oops");
}
pragma (inline, true)void test2()
{
        static pure nothrow @nogc @safe int abc(int a)
        {
                return a;
        }
        writeln(((int a = 5;) , a));
        writeln("oops");
}
void test3()
{
        static pure nothrow @nogc @safe int abc(int a)
        {
                return a;
        }
        writeln(abc(5));
        writeln("oops");
}
void main()
{
        {
                writeln(5);
                writeln("oops");
        }
        test2();
        test3();
}
```

When I define a function inside it but I'm using pragma(inline), it actually
inlines the function defined inside it. When I  don't, it correctly inlines.
But when I put it inside the function defined, it completely disappears! -
https://issues.dlang.org/show_bug.cgi?id=23520 related

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