[3.13] GH-123545: Remove duplicate Py_DECREF when handling _PyOptimizer_Optimize errors (GH-123759)

savannahostrowski · web-flow · commit eac2fdacfb1b · 2024-09-06T09:02:32.000-07:00
(cherry picked from commit 1fbc118) Co-authored-by: Savannah Ostrowski <savannahostrowski@gmail.com>
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2024-09-01-00-02-05.gh-issue-123545.8nQNbL.rst b/Misc/NEWS.d/next/Core_and_Builtins/2024-09-01-00-02-05.gh-issue-123545.8nQNbL.rst
@@ -0,0 +1 @@
+Fix a double decref in rare cases on experimental JIT builds.
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
@@ -4322,8 +4322,6 @@ dummy_func(
                 if (optimized <= 0) {
                     exit->temperature = restart_backoff_counter(exit->temperature);
                     if (optimized < 0) {
-                        Py_DECREF(current_executor);
-                        tstate->previous_executor = Py_None;
                         GOTO_UNWIND();
                     }
                     GOTO_TIER_ONE(target);
diff --git a/Python/executor_cases.c.h b/Python/executor_cases.c.h

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Fix a double decref in rare cases on experimental JIT builds.`
Original file line number	Diff line number	Diff line change
`@@ -4322,8 +4322,6 @@ dummy_func(`
`4322`	`4322`	`if (optimized <= 0) {`
`4323`	`4323`	`exit->temperature = restart_backoff_counter(exit->temperature);`
`4324`	`4324`	`if (optimized < 0) {`
`4325`		`- Py_DECREF(current_executor);`
`4326`		`- tstate->previous_executor = Py_None;`
`4327`	`4325`	`GOTO_UNWIND();`
`4328`	`4326`	`}`
`4329`	`4327`	`GOTO_TIER_ONE(target);`