how to pass a malloc'd C string over to be managed by the GC

[Kagamin]

byte[] snappyCompress(in byte[] plaintext) {
	import deimos.snappy.snappy;
	size_t output_length = 
snappy_max_compressed_length(plaintext.length);
	byte[] output = new byte[output_length];
	if(snappy_compress(cast(char*)plaintext.ptr, plaintext.length, 
cast(char*)output.ptr, &output_length) == SNAPPY_OK) {
		byte[] compressed = output[0..output_length];
                 // <---- do something magical here
		return compressed;
	}
	assert(0);
}

Snappy works on bytes, not text, char is a wrong type there.