Fix off-by-one

Fidget-Spinner · Fidget-Spinner · commit 308ccc053a5e · 2025-11-13T16:10:03.000Z
diff --git a/Python/optimizer.c b/Python/optimizer.c
@@ -619,7 +619,7 @@ _PyJit_translate_single_bytecode_to_trace(
 
     /* Special case the first instruction,
     * so that we can guarantee forward progress */
-    if (progress_needed && _tstate->jit_tracer_state.prev_state.code_curr_size <= CODE_SIZE_NO_PROGRESS) {
+    if (progress_needed && _tstate->jit_tracer_state.prev_state.code_curr_size < CODE_SIZE_NO_PROGRESS) {
         if (OPCODE_HAS_EXIT(opcode) || OPCODE_HAS_DEOPT(opcode)) {
             opcode = _PyOpcode_Deopt[opcode];
         }

Original file line number	Diff line number	Diff line change
`@@ -619,7 +619,7 @@ _PyJit_translate_single_bytecode_to_trace(`
`619`	`619`
`620`	`620`	`/* Special case the first instruction,`
`621`	`621`	`* so that we can guarantee forward progress */`
`622`		`- if (progress_needed && _tstate->jit_tracer_state.prev_state.code_curr_size <= CODE_SIZE_NO_PROGRESS) {`
	`622`	`+ if (progress_needed && _tstate->jit_tracer_state.prev_state.code_curr_size < CODE_SIZE_NO_PROGRESS) {`
`623`	`623`	`if (OPCODE_HAS_EXIT(opcode) \|\| OPCODE_HAS_DEOPT(opcode)) {`
`624`	`624`	`opcode = _PyOpcode_Deopt[opcode];`
`625`	`625`	`}`