@Test
	public void testDisassemblerDataConflict() throws Exception {

		programBuilder.addBytesFallthrough(10);
		programBuilder.addBytesReturn(12);

		listing.createData(addr(13), ByteDataType.dataType);

		AddressSetView disAddrs = disassembler.disassemble(addr(10), null);

		assertEquals(addrset(range(10, 11)), disAddrs);

		verifyInstructionPresence(CollectionUtils.asSet(addr(12)));

		verifyErrorBookmark(addr(12), "conflicting data");

	}
10: or    
    12: ret   (Not parsed due to data conflict @ 13)
    
Test data conflict error
Ghidra/Test/IntegrationTest/src/test.slow/java/ghidra/program/disassemble/DisassemblerTest.java