Using Hash::Merge breaks use of object hashes in programs using it

[jnthn]

The issue:

$ perl6 -e 'use Hash::Merge; my %h{Any}'
===SORRY!===
Cannot invoke this object (REPR: Null; VMNull)

I golfed this down from a crash in an application that is using Config, which in turn depends on Hash::Merge, and was exploding on a use of classify. The classify method uses object hashes, which no longer work after a use of this module, as shown above.

In general, modules that use MONKEY-TYPING should also do no precompilation, since it's not possible to load two precompiled modules that monkey-patch the same type in the same program.

Really, Rakudo should be taking a use MONKEY-TYPING as implying no precompilation. Even then, I think there's still a separate bug. I will file a Rakudo issue about this, and see if something can be fixed at that level (both the implied no precompilation and the issue that leads to the null invocation error seen here).

In the meantime, a release of this module that adds no precompilation would provide relief for those who want to use Config; if it helps, I can provide a PR to add that one line.

[Tyil]

Thanks for reporting the issue, @jnthn!

I will make a fix for this later today, and make a new release for it on CPAN shortly after that.