skip unpacking newtypes that aren't reduced by topNormaliseType.

fix CoreAlt change.
25 jobs for !4140 with os/unpack_sums in 596 minutes and 9 seconds (queued for 10 minutes and 50 seconds)
merge request
Name Stage Failure
failed
validate-aarch64-linux-deb10 Full Build
Uploading artifacts...
WARNING: ghc-aarch64-linux-deb10.tar.xz: no matching files
WARNING: junit.xml: no matching files
WARNING: performance-metrics.tsv: no matching files
ERROR: No files to upload
Uploading artifacts...
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1
failed
validate-armv7-linux-deb10 Full Build
Uploading artifacts...
ghc-armv7-linux-deb10.tar.xz: found 1 matching files

junit.xml: found 1 matching files

performance-metrics.tsv: found 1 matching files

Uploading artifacts to coordinator... ok
id=588048 responseStatus=201 Created token=Rny5a2ea
Uploading artifacts...
junit.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=588048 responseStatus=201 Created token=Rny5a2ea
ERROR: Job failed: exit code 1