Always load EX(opline) into the current frame in JIT when observers are enabled

Fixes #13772.

Author: bwoebi

ext/opcache/jit/zend_jit_arm64.dasc

@@ -9475,7 +9475,7 @@ static int zend_jit_do_fcall(dasm_State **Dst, const zend_op *opline, const zend
 		}
 
 		if (ZEND_OBSERVER_ENABLED) {
-			|	SAVE_IP
+			|	SET_EX_OPLINE opline, REG0
 			|	mov FCARG1x, FP
 			|	EXT_CALL zend_observer_fcall_begin, REG0
 		}

ext/opcache/jit/zend_jit_x86.dasc

@@ -10221,7 +10221,7 @@ static int zend_jit_do_fcall(dasm_State **Dst, const zend_op *opline, const zend
 		}
 
 		if (ZEND_OBSERVER_ENABLED) {
-			|	SAVE_IP
+			|	SET_EX_OPLINE opline, r0
 			|	mov FCARG1a, FP
 			|	EXT_CALL zend_observer_fcall_begin, r0
 		}

ext/opcache/tests/jit/gh13772.phpt

@@ -0,0 +1,26 @@
+--TEST--
+EX(opline) is correctly set for nested JIT user code calls
+--EXTENSIONS--
+opcache
+zend_test
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+zend_test.observer.enabled=1
+zend_test.observer.observe_all=1
+zend_test.observer.show_output=0
+--FILE--
+<?php
+
+function Ack($m, $n) {
+	if ($m == 0) return $n+1;
+	if ($n == 0) return Ack($m-1, 1);
+	return Ack($m - 1, Ack($m, ($n - 1)));
+}
+
+var_dump(Ack(3, 3));
+
+?>
+--EXPECT--
+int(61)
+

ext/zend_test/observer.c

@@ -69,6 +69,9 @@ static void observer_show_opcode(zend_execute_data *execute_data)
 
 static void observer_begin(zend_execute_data *execute_data)
 {
+	ZEND_ASSERT(!ZEND_USER_CODE(EX(func)->type) ||
+		(EX(opline) >= EX(func)->op_array.opcodes && EX(opline) < EX(func)->op_array.opcodes + EX(func)->op_array.last));
+
 	if (!ZT_G(observer_show_output)) {
 		return;
 	}