[Issue 20989] New: Checking array.ptr causes safety error with -checkaction=context

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20989

          Issue ID: 20989
           Summary: Checking array.ptr causes safety error with
                    -checkaction=context
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: moonlightsentinel at disroot.org

The following code fails to compile with -checkaction=context:

========================================
void main() @safe
{
    uint[] arr = [1, 2, 3];
    assert(!arr.ptr);
    assert(arr.ptr is arr.ptr);
}
========================================

dmd --checkaction=context safety.d
safety.d(6): Error: arr.ptr cannot be used in @safe code, use &arr[0] instead
safety.d(7): Error: arr.ptr cannot be used in @safe code, use &arr[0] instead
safety.d(7): Error: arr.ptr cannot be used in @safe code, use &arr[0] instead

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