This doesn't mention one of my favorite bash gotchas, which is using `set -e` with `pipefail` at all. Try this: set -euo pipefail yes | head That will

This doesn't mention one of my favorite bash gotchas, which is using `set -e` with `pipefail` at all. Try this: set -euo pipefail yes | head That will consistently exit because `yes` gets sigpipe and quits. Which is expected, but triggers a script exit. But more exciting is that something like: generate_data | head only _sometimes_ fail. It's a race that depends on whether generate_data is able to stuff all of its data into the pipe buffer before head calls close(). EDIT: I seemed to remember sharing this bug not too long ago, and indeed I did. pixelbeat responded with some interesting links: https://news.ycombinator.com/item?id=13940628 https://news.ycombinator.com/item?id=13940628