A steam locomotive from 1993 broke my yarn test

So the real problem is that Jest just executes to whatever `sl` resolves. The fix they intent to release doesn't address that, but it tries to recognise the train steaming through. How is this acceptable behaviour from a test runner, as it looks like a disaster to happen. What if I have `alias sl=rm -rf /`, as one typically wants to have such a command close at hand?

Exec doesn't know about shell aliases. Only what's in the $PATH.

I liked the shell in MPW (Mac Programmer's Workshop, pre-NeXT) where common commands had both long names and short ones. You'd type the short ones at the prompt, but use the long, unambiguous ones in scripts.