Oli Scherer 20371b94f6 Immediately register new opaque types in the global list.
Previously each opaque type instantiation would create new inference vars, even for the same opaque type/substs combination. Now there is a global map in InferCtxt that gets filled whenever we encounter an opaque type.
2021-08-06 10:39:08 +00:00
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2021-07-20 22:14:42 +08:00