Trac #13255

[Simon Peyton Jones]

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
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