4239680f53
newton's method in integers can settle into a two-value cycle rather than a fixed point, and the loop guard was "the value changed", which such a cycle satisfies for ever. it ran under the session lock inside a spawned task, so the worker never reached a yield point and the runtime could not shut down - which is why ctrl-c printed "shutdown requested" and then hung. the guard is now "stopped decreasing", which is the converging form. checked against the exact integer square root across the small range and the boundaries, including the 46340 saturation edge and INT_MAX. |
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| Cargo.toml | ||