diff --git a/Zend/tests/gh11108.phpt b/Zend/tests/gh11108.phpt
new file mode 100644
index 00000000000..efbd12dc367
--- /dev/null
+++ b/Zend/tests/gh11108.phpt
@@ -0,0 +1,11 @@
+--TEST--
+GH-11108: Incorrect CG(memoize_mode) state after bailout in ??=
+--FILE--
+<?php
+register_shutdown_function(function() {
+    include __DIR__ . '/gh11108_shutdown.inc';
+});
+include __DIR__ . '/gh11108_test.inc';
+?>
+--EXPECTF--
+Fatal error: Cannot use [] for reading in %s on line %d
diff --git a/Zend/tests/gh11108_shutdown.inc b/Zend/tests/gh11108_shutdown.inc
new file mode 100644
index 00000000000..34f8131d4a8
--- /dev/null
+++ b/Zend/tests/gh11108_shutdown.inc
@@ -0,0 +1,5 @@
+<?php
+
+function test() {
+    throw new Exception();
+}
diff --git a/Zend/tests/gh11108_test.inc b/Zend/tests/gh11108_test.inc
new file mode 100644
index 00000000000..2dd85eef49a
--- /dev/null
+++ b/Zend/tests/gh11108_test.inc
@@ -0,0 +1,3 @@
+<?php
+
+$messageList[] ??= true;
diff --git a/Zend/zend.c b/Zend/zend.c
index 141d9bb4ad4..bbddd459704 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -1190,6 +1190,7 @@ ZEND_API ZEND_COLD ZEND_NORETURN void _zend_bailout(const char *filename, uint32
 	CG(unclean_shutdown) = 1;
 	CG(active_class_entry) = NULL;
 	CG(in_compilation) = 0;
+	CG(memoize_mode) = 0;
 	EG(current_execute_data) = NULL;
 	LONGJMP(*EG(bailout), FAILURE);
 }