!3729: Add regression test for #18478 · Merge requests · Glasgow Haskell Compiler / GHC · GitLab

Sebastian Graf requested to merge wip/T18478 into master Jul 20, 2020

!3392 (merged) backported !2993 (closed) to GHC 8.10.2 which most probably is responsible for fixing #18478 (closed), which triggered a pattern match checker performance regression in GHC 8.10.1 as first observed in #17977 (closed).