T4808 fails in the threaded2 way
Quite inexplicably:
--- libraries/base/tests/IO/T4808.run/T4808.stdout.normalised 2019-07-04 17:14:56.031486699 +0000
+++ libraries/base/tests/IO/T4808.run/T4808.run.stdout.normalised 2019-07-04 17:14:56.031486699 +0000
@@ -1 +1 @@
-True
+False