Summary: pragma(msg) segfaults with an aggregate including a
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: CTFE, ice
          Severity: normal
          Priority: P2
         Component: DMD

--- Comment #0 from 2012-02-23 11:02:13 PST ---
Test cases:

class C7568 {}
struct S7568 { C7568 c; }
auto test7568a() { return [new C7568]; }
auto test7568b() { return S7568(new C7568); }

pragma(msg, test7568a());
pragma(msg, test7568b());

This will cause a segmentation fault:

    test.d(4): Error: C7568 class literals cannot be returned from CTFE
    Segmentation fault

This happens because an Expression* is assigned to the value 0x1, and the
function 'argsToCBuffer' is trying to access the expression without first
checking if the expression is a valid pointer.

The program should simply fail to compile, without the segfault.

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