diff --git a/ext/opcache/jit/zend_jit.c b/ext/opcache/jit/zend_jit.c
index 4a327389434..9afe38f701c 100644
--- a/ext/opcache/jit/zend_jit.c
+++ b/ext/opcache/jit/zend_jit.c
@@ -2760,8 +2760,8 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
 					/* THROW and EXIT may be used in the middle of BB */
 					/* don't generate code for the rest of BB */
 
-					/* Skip current opline for call_level computation
-					 * Don't include last opline because end of loop already checks call level of last opline */
+					/* Skip current opline for call_level computation because it does not influence call_level.
+					 * Don't include last opline because end of loop already checks call level of last opline. */
 					i++;
 					for (; i < end; i++) {
 						opline = op_array->opcodes + i;
@@ -2771,7 +2771,7 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
 							call_level--;
 						}
 					}
-					opline = op_array->opcodes + i;
+					opline = op_array->opcodes + end;
 					break;
 				/* stackless execution */
 				case ZEND_INCLUDE_OR_EVAL:
diff --git a/ext/opcache/tests/jit/gh17428.phpt b/ext/opcache/tests/jit/gh17428.phpt
new file mode 100644
index 00000000000..21bb1867632
--- /dev/null
+++ b/ext/opcache/tests/jit/gh17428.phpt
@@ -0,0 +1,35 @@
+--TEST--
+GH-17428 (Assertion failure ext/opcache/jit/zend_jit_ir.c:8940)
+--EXTENSIONS--
+opcache
+--INI--
+opcache.jit=1205
+--FILE--
+<?php
+new EmptyIterator();
+srand(1000);
+error_reporting(E_ALL);
+testConversion('', '');
+testConversion('', '');
+testConversion('', '');
+testConversion('', '');
+testConversion('', '');
+function testRoundTrip($data) {
+}
+for ($iterations = 0; $iterations < 100; $iterations++) {
+    $strlen = rand(1, 100);
+    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    $randstring = '';
+    for ($i = 0; $i < $strlen; $i++) {
+        $randstring .= $characters[rand(0, strlen($characters) - 1)];
+    }
+    die($randstring);
+}
+echo "Done!\n";
+throw new Hello(new stdClass);
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Call to undefined function testConversion() in %s:%d
+Stack trace:
+#0 {main}
+  thrown in %s on line %d