Close #31687, #31684 Zone.js patches rxjs internal `_subscribe` and `_unsubscribe` methods, but zone.js doesn't do null check, so in some operator such as `retryWhen`, the `_unsubscribe` will be set to null, and will cause zone patched version throw error. In this PR, if `_subscribe` and `_unsubscribe` is null, will not do the patch. PR Close #35990
Angular
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License: MIT