Kaz Wesley kazcw

Classification of undefined behavior that is not demonstrably unreachable in production:

Unportable (across toolchains as well as platforms)

Classes of "technically undefined" behavior that a lot of software depends on, so the supported toolchain/platform combinations wouldn't be able to get away with breaking it.

Examples: Out-of-bounds pointer created, but not dereferenced

Sparse blocks

exchange priority policies in peer introductions
assign unique sequential IDs in the order the transactions were inved (per peer) receiving a getdata for a tx updates last-known-peer-received inv to all invs up to the one referenced
include ID-last-received, last-known-peer-received in sparse block
reference txes in sparse block by index in receiver's prioritiziation with peer's sent invs up to ID-last-received and sender's prior invs up to last-known-peer-received

	#!/bin/sh

	# Distinguishes B0 from C0. Likely won't distinguish C0 from whatever comes next.

	SD=$(od -An -tx1 -w24 /proc/device-tree/emmc2bus/dma-ranges \| tr -d ' ')

	if [ $SD = 00000000c0000000000000000000000040000000 ]; then echo B0; exit; fi
	if [ $SD = 00000000000000000000000000000000fc000000 ]; then echo C0; exit; fi
	echo '??'

	stdenv.mkDerivation {
	name = "rustc-local";
	buildInputs = [
	gcc gnumake python2 cmake curl git
	# if enabled in config.toml
	ninja
	];
	}

	{ pkgs ? import <nixpkgs> {} }:

	(pkgs.buildFHSUserEnv {
	name = "esy-env";
	targetPkgs = pkgs: (with pkgs;
	[
	# this set suffices to build esy 0.3.4 with esy 0.2.11
	# and also to build the hello-ocaml demo with esy 0.3.4
	nodejs-10_x
	stdenv.cc

	[package]
	name = "rust-async-qotd"
	version = "0.1.0"
	authors = ["Gökberk Yaltıraklı <[email protected]>"]

	[dependencies]
	tokio = { git = "https://github.com/tokio-rs/tokio" }
	rand = "0.3"