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revert MG consting (Coro breakage) for 5.24?

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Dave Mitchell
May 3, 2016 18:34
revert MG consting (Coro breakage) for 5.24?
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I hadn't realised until recently that the Coro breakage caused by
consting the MGF vtable array in commit v5.21.7-98-gc910fea, is still

I propose that we revert this commit for 5.24 (we need another RC anyway
for the SvGROW) issue.

This should have relatively minimal effect (apart from 4K extra memory
usage per process), since all it would be doing is removing a constraint
on XS code (the vtable array can now be modified by XS code again).

Then post 5.24 we an worry about what changes can be provided by the perl
core (e.g. [perl #125439]) that would make it unnecessary for things like
like Coro to need to modify the vtable array.

Nothing ventured, nothing lost.

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