Make sure this testcase keeps crashing with -O3. Recent optimization improvements made LLVM realize the store-to-null was unavoidable, so it deleted all of main() and replaced it with 'unreachable'. Because the body of main() no longer even contained a return instruction, calling it caused random code to be ran instead. This happened to be the code that links in the ModuleInfo on my machine, which then returned "successfully".

#ifndef __LDC_IR_IRSYMBOL_H__
#define __LDC_IR_IRSYMBOL_H__

#include "ir/ir.h"

/// Base class for all symbols.
struct IrSymbol
{
    ///
    IrSymbol(Ir* ir) : ir(ir) {}

    /// Migrate symbols to current module if necessary.
    virtual void migrate() = 0;

protected:
    ///
    Ir* ir;
};

#endif