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-rw-r--r--Misc/NEWS.d/next/Core and Builtins/2022-06-29-22-18-36.gh-issue-91719.3APYYI.rst2
-rw-r--r--Python/ceval.c3
2 files changed, 5 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-06-29-22-18-36.gh-issue-91719.3APYYI.rst b/Misc/NEWS.d/next/Core and Builtins/2022-06-29-22-18-36.gh-issue-91719.3APYYI.rst
new file mode 100644
index 0000000..0d085e8
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-06-29-22-18-36.gh-issue-91719.3APYYI.rst
@@ -0,0 +1,2 @@
+Reload ``opcode`` when raising ``unknown opcode error`` in the interpreter main loop,
+for C compilers to generate dispatching code independently.
diff --git a/Python/ceval.c b/Python/ceval.c
index 946e997..4fcdf9b 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -5706,6 +5706,9 @@ handle_eval_breaker:
#else
EXTRA_CASES // From opcode.h, a 'case' for each unused opcode
#endif
+ /* Tell C compilers not to hold the opcode variable in the loop.
+ next_instr points the current instruction without TARGET(). */
+ opcode = _Py_OPCODE(*next_instr);
fprintf(stderr, "XXX lineno: %d, opcode: %d\n",
_PyInterpreterFrame_GetLine(frame), opcode);
_PyErr_SetString(tstate, PyExc_SystemError, "unknown opcode");