Alternative fix that should cover all cases

there doesn't seem to be a thread post-startup hook that runs after
zend_startup_cb() that could be used for this

this fix is similar to accel_startup_ok() as seen here: https://github.com/php/php-src/blob/fc1db70f106525e81f9a24539340b7cf2e82e844/ext/opcache/ZendAccelerator.c#L2631-L2634

Author: dktapps

ext/opcache/jit/zend_jit.c

@@ -4798,7 +4798,7 @@ ZEND_EXT_API int zend_jit_config(zend_string *jit, int stage)
 		return FAILURE;
 	}
 
-	if (zend_jit_startup_failed || zend_string_equals_literal_ci(jit, "disable")) {
+	if (zend_string_equals_literal_ci(jit, "disable")) {
 		JIT_G(enabled) = 0;
 		JIT_G(on) = 0;
 		return SUCCESS;
@@ -5098,6 +5098,13 @@ static void zend_jit_reset_counters(void)
 
 ZEND_EXT_API void zend_jit_activate(void)
 {
+#ifdef ZTS
+	if (zend_jit_startup_failed) {
+		JIT_G(enabled) = 0;
+		JIT_G(on) = 0;
+		return;
+	}
+#endif
 	zend_jit_profile_counter = 0;
 	if (JIT_G(on)) {
 		if (JIT_G(trigger) == ZEND_JIT_ON_HOT_COUNTERS) {