Reading file in chunks using boost::iostreams::mapped_file_source crashes on Windows

[BullyWiiPlaza]

I wasted a few hours wondering and trying to fix a bug which caused my application to crash the moment I tried to read the 2nd chunk of a file. The same code runs just fine on Linux but does not on Windows.

Here is the code snippet I'm using:

boost::iostreams::mapped_file_source read_bytes(const char *file_path,
unsigned_value offset, unsigned_value length) {
	iostreams::mapped_file_params parameters;
	parameters.path = file_path;
	parameters.length = static_cast<size_t>(length);
	parameters.flags = iostreams::mapped_file::mapmode::readonly;
	parameters.offset = static_cast<boost::iostreams::stream_offset>(offset);

	boost::iostreams::mapped_file_source file;

	file.open(parameters);

	if (file.is_open()) {
		return file;
	}

	printf("Failed to open file\n");
	exit(EXIT_FAILURE);
}

This is the exception Visual Studio showed me:

Unhandled exception at 0x00007FFD7AFBA388 in PointerSearcher.exe: Microsoft C++ exception: boost::wrapexcept<std::ios_base::failure> at memory location 0x0000003034FCF270.

I'm pretty sure I didn't mess anything up since the behavior of Boost should be identical on all platforms and I'm using an offset and a length to read chunks from a file.

Thank you.