Ben I have pushed a fix for #13255 (blocking the release) to wip/T13255-spj It contains a series of patches, of which the important one is the last. But Phabbing them exceeded my skill level. I'm rebuilding yet again, but I got a couple of strange testsuite errors. Here is one T2592: Heap exhausted; T2592: Current maximum heap size is 1048576 bytes (1 MB). T2592: Use `+RTS -M<size>' to increase it. +T2592: Heap exhausted; +T2592: Current maximum heap size is 1048576 bytes (1 MB). +T2592: Use `+RTS -M<size>' to increase it. Why would the identical message (from the RTS) now be printed twice? I'm baffled. Maybe a clean build will help. Meanwhile I'm out of time. Can I hand the branch off to you to complete and merge? Get back to me if problems. Simon