Fix double-initialization

Author: Fidget-Spinner

Python/bytecodes.c

@@ -5490,8 +5490,8 @@ dummy_func(
                 }
                 _PyExecutorObject *previous_executor = _PyExecutor_FromExit(exit);
                 assert(tstate->current_executor == (PyObject *)previous_executor);
-                int chain_depth = previous_executor->vm_data.chain_depth + 1;
-                _PyJIT_InitializeTracing(tstate, frame, target, STACK_LEVEL(), chain_depth);
+                // Set chain_depth to 0 because we want to keep tracing whatever we see next.
+                _PyJIT_InitializeTracing(tstate, frame, target, STACK_LEVEL(), 0);
                 GOTO_TIER_ONE(target, 1);
             }
             exit->executor = executor;

Python/ceval_macros.h

@@ -417,7 +417,6 @@ do {                                                   \
     if (keep_tracing_bit) { \
         assert(next_instr->op.code != ENTER_EXECUTOR); \
         ENTER_TRACING(); \
-        _PyJIT_InitializeTracing(tstate, frame, next_instr, STACK_LEVEL(), 0); \
     } \
     else { \
         LEAVE_TRACING(); \

Python/executor_cases.c.h

@@ -805,7 +805,7 @@ _PyJIT_InitializeTracing(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_
         lltrace = *python_lltrace - '0';  // TODO: Parse an int and all that
     }
     DPRINTF(2,
-        "Optimizing %s (%s:%d) at byte offset %d\n",
+        "Tracing %s (%s:%d) at byte offset %d\n",
         PyUnicode_AsUTF8(code->co_qualname),
         PyUnicode_AsUTF8(code->co_filename),
         code->co_firstlineno,