Ben

I have pushed a new fix to the 7.10 branch, onto branch wip/T10572-2.   (Don’t apply this to HEAD.)

Can you try it.  I get validate failures as below, but I am hard pressed to see how they could be related.  (The perf changes may be.)

Simon

Unexpected failures:

   codeGen/should_run        T10414 [exit code non-0] (threaded2)

   driver                    T8959a [bad stderr] (normal)

   ghci/scripts              T9878b [bad stderr] (ghci)

   simplCore/should_compile  T4945 [bad stdout] (normal)

   th                        T10279 [stderr mismatch] (normal)

Unexpected stat failures:

   perf/compiler    T9961 [stat too good] (normal)

   perf/should_run  T4830 [stat not good enough] (normal)

   perf/should_run  T7436 [stat not good enough] (normal)