[$] A new approach to validating test suites

The first program that Martin Pool ever wrote, he said, had bugs; the ones he's writingnow most likely have bugs too. The talk Pool gave atRustConf this year was about a way to tryto write programs with fewer bugs. He has developed a tool calledcargo-mutants that highlights gaps in test coverage by identifyingfunctions that can be broken without causing any tests to fail.This can be a valuable complement to other testing techniques,he explained.