[nomerge] Emit warnings in the REPL #9298
Merged
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My attempt to backport #7756, but it doesn't fix the tests. (I hand-rolled their checkfiles so don't take them as canon.)
@som-snytt I think I'm right in thinking that you aren't that interested in sinking time in 2.12's REPL. But in the interest of getting 2.12 and 2.13 released, could you spend a second seeing if you can see what's missing to fix this? It might be a blocker for the 2.12 release...