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The tests hof-916 xqhof10 xqhof12 use partial function application of a function that is a context-dependent built-in function, and should therefore also expect XPST0112. (I'm now firmly of the opinion that the restrictions which lead to XPST0112 will cause users annoying inconvenience).
Correction: hof-916 should also expect XPST0112. The other two should _only_ expect XPST0112.
This has now been made permissible. No change required.