3e8ae5dcba
Clone entire `TokenCursor` when collecting tokens Reverts PR #80830 Fixes taiki-e/pin-project#312 We can have an arbitrary number of `None`-delimited group frames pushed on the stack due to proc-macro invocations, which can legally be exited. Attempting to account for this would add a lot of complexity for a tiny performance gain, so let's just use the original strategy. |
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