[Issue 7629] New: Add check for ref/out parameters not being null

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7629

           Summary: Add check for ref/out parameters not being null
           Product: D
           Version: D1 & D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: verylonglogin.reg at gmail.com


--- Comment #0 from Denis <verylonglogin.reg at gmail.com> 2012-03-02 17:48:33 MSK ---
---
void f(ref int i) { }
void g(out int i) { }

void main()
{
    int* ptr = null;
    f(*ptr); // No RT errors
    g(*ptr); // `Access violation` because of a try to write a default value
}
---
Tests for ref/out parameters not being null will be very useful.

Current specs doesn't prohibit null ref/out parameters but it looks
inconsistent. I'd like specs to be changed to prohibit such cases or to clarify
why is it useful (and not prohibited).

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