It's not yet possible to make a test case which should compile without error. But this one segfaults on 2.050.
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int function() bug5159 = function int() { return 27; };
static assert(bug5159());
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PATCH: interpret.c, CallExp::interpret(), line 2715.

    if (ecall->op == TOKstar)
    {   // Calling a function pointer
        Expression * pe = ((PtrExp*)ecall)->e1;
        if (pe->op == TOKvar) {
            VarDeclaration *vd = ((VarExp *)((PtrExp*)ecall)->e1)->var->isVarDeclaration();
            if (vd && vd->value && vd->value->op == TOKsymoff)
                fd = ((SymOffExp *)vd->value)->var->isFuncDeclaration();
            else {
-                ecall = vd->value->interpret(istate);
+                ecall = getVarExp(loc, istate, vd);
+                if (ecall == EXP_CANT_INTERPRET)
+                    return ecall;
                if (ecall->op == TOKsymoff)
                        fd = ((SymOffExp *)ecall)->var->isFuncDeclaration();
                }