Re: Names for general merge tactics in Data.Map

On Sat, 20 Aug 2016, David Feuer wrote:

Argh! It probably actually is possible to emulate generalMergeA using mergeWithKey, although it won't be pretty. I'll see if I can work up a compat package in case someone needs one, but that probably won't happen before the next containers release.

I do not use the GHC API, so far. If this is the only problem I would try to install a new containers additionally to the global one.