fix(tasklet): release the PyGreenlet_Switch return reference#38
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PyGreenlet_Switch returns a new reference to the switched-in value, but it was assigned straight into a bool, so the object was never released. This leaks a reference on every tasklet switch (the hottest path on the server) and grows unbounded over uptime. Capture the result, derive the success bool from it, and Py_XDECREF it.
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Summary
Fixes a reference leak on the hottest scheduler path.
Problem
PyGreenlet_Switchreturns a new reference to the switched-in value, butit was assigned straight into a
bool. The object was never released,leaking a reference on every tasklet switch and growing memory unbounded
over server uptime.
Fix
Capture the result into a
PyObject*, derive the success bool from it,and
Py_XDECREFit. No semantic change — the code only ever used theboolean meaning of the result.
Type
Performance / stability — memory leak on the critical path (Critical;
whole-shard blast radius).
Testing
Manual review; control flow (
if(!ret),return ret) preserved.