[Issue 19961] New: context pointer does not apply qualifiers properly

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19961

          Issue ID: 19961
           Summary: context pointer does not apply qualifiers properly
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: iamthewilsonator at hotmail.com

void main()
{
    int i = 42;    
    // const should not be able to access mutable.
    int* p = &i;
    auto dg2 = delegate int() const { return *p; };
    assert(dg2() == i);
}

fails to error.

Also 

void main()
{
    int i = 42;    
    // shared cannot access mutable
    int* p = &i;
    auto dg2 = delegate int() shared { return *p; };
    assert(dg2() == i);
}

errors, the context should be captured as shared so that should be allowed.
Issue 15306 declared this accepts invalid as shared aliasing but I believe that
is incorrect. Shared doesn't offer any useful guaruntees on that front anyway.

--