possible breaking change in test-support/tetsy-reference-trie/lib.rs @tetsy-memory-db-v0.19

[marlonhanks]

line 587 modification:

impl<'a> Input for ByteSliceInput<'a> {
	fn remaining_len(&mut self) -> Result<usize, CodecError> {
		let remaining = if self.offset <= self.data.len() {
			Some(self.data.len() - self.offset)
		} else {
			None
		};
		Ok(remaining.unwrap())
	}

	fn read(&mut self, into: &mut [u8]) -> Result<(), CodecError> {
		let range = self.take(into.len())?;
		into.copy_from_slice(&self.data[range]);
		Ok(())
	}

	fn read_byte(&mut self) -> Result<u8, CodecError> {
		if self.offset + 1 > self.data.len() {
			return Err("out of data".into());
		}

		let byte = self.data[self.offset];
		self.offset += 1;
		Ok(byte)
	}
}

Original:

impl<'a> Input for ByteSliceInput<'a> {
	fn remaining_len(&mut self) -> Result<Option<usize>, CodecError> {
		let remaining = if self.offset <= self.data.len() {
			Some(self.data.len() - self.offset)
		} else {
			None
		};
		Ok(remaining)
	}

	fn read(&mut self, into: &mut [u8]) -> Result<(), CodecError> {
		let range = self.take(into.len())?;
		into.copy_from_slice(&self.data[range]);
		Ok(())
	}

	fn read_byte(&mut self) -> Result<u8, CodecError> {
		if self.offset + 1 > self.data.len() {
			return Err("out of data".into());
		}

		let byte = self.data[self.offset];
		self.offset += 1;
		Ok(byte)
	}
}