HsToCore: Eta expand left sections
Strangely, the comment next to this code already alluded to the fact that even simply eta-expanding will sacrifice laziness. It's quite unclear how we regressed so far.
Fixes #18151 (closed).
Strangely, the comment next to this code already alluded to the fact that even simply eta-expanding will sacrifice laziness. It's quite unclear how we regressed so far.
Fixes #18151 (closed).