Detect circular instantiated types#3316
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I don't think this is necessary because you only refer to symbol once
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Not sure what you mean. It is referenced in a loop that will run at least 10 times (as we known depth >= 10).
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I mean just once lexically. I didn't know the runtime references count individually wrt to local vars.
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Conflicts: src/compiler/checker.ts src/compiler/types.ts
ahejlsberg
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Detect circular instantiated types
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Fixes #3309 (and revises fix for #3237).
This PR switches our
isDeeplyNestedGenericfunction to track both type references and instantiated anonymous types. The key change is that we use the symbol associated with the type as the tracked identity (which is always the symbol of the type being instantiated). We likewise now use symbols to track cyclic anonymous types in the type-to-string logic.The PR removes the anonymous type instantiation caching implemented in #3239 as it is no longer necessary.