variant mismatch when updating pango/cairo

[Jeremy Lavergne]

> I understand that there has to be a match between versions. What
> wasn't perfectly clear to me was whether or not macports could use a
> disabled (already installed) version with matching options or not
> (possibly by switching versions back and forth).

MacPorts can swap between installed versions of a port while considering variants and version together, but you have to ask it to do so manually. Since variants are considered during this, if there's a specific set other than the default you must specify it. It's a good habit to always use all the variants when activating/deactivating ports:

sudo port activate cairo @1.12.0_0+quartz+universal+x11

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