@Test
	public void test_DW_OP_deref() throws DWARFExpressionException {
		DWARFExpression expr =
			evaluator.readExpr(new byte[] { (byte) DW_OP_fbreg, 0x48, DW_OP_deref });

		evaluator.setFrameBase(0);
		evaluator.evaluate(expr);
		assertTrue(evaluator.isDeref());
	}
Test reading (but not executing) an expression that has every opcode
that takes operands.  Operands that are signed vs unsigned are present in
byte patterns that exercise high-bit set vs. not set.
@throws IOException
Ghidra/Features/Base/src/test/java/ghidra/app/util/bin/format/dwarf/expression/DWARFExpressionEvaluatorTest.java