8054caaf

By: Greg Pfeil <greg@technomadic.org>

Report compile error, don’t panic

GHC has no reason to expect an `ErrorCall` from a Core pass, so it caught it as
an internal failure and printed

    panic! (the 'impossible' happened)
      GHC version 9.10.3:
        encountered recursion, which has been disabled:

followed by an invitation to report a GHC bug. This now reports an error
correctly.

The message itself is unchanged. Clears all four failures the previous commit
landed.

Suite timing

Time to Start Worker time Duration Time to finish Idle
Config 2s 5s 5s 7s 2s
Eval 10s 39s 39s 49s 2s
Build 36s 5m26s 1m53s 2m29s 0s
Suite 2s 6m11s 2m27s 2m29s 4s

Timeline

0s20s30s40s50s1m1m10s1m20s1m30s1m40s1m50s2m2m10s2m20s