这个是代码错误，有点傻眼了。
解决办法一：删除
从目录来看这个不是必须的。可以删除。
解决办法二：修改代码
//错误修正参考：http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/dba0765d2b6d
先打开代码test/hotspot/gtest/utilities/test_json.cpp看看：
TEST_VM(utilities, json_key_values_1) { JSON_GTest::test("/* comment */{ key1 : { \"key2\" : { \"key3\" : [ \"elem1\", \"elem2\"," "{ \"key4\" : null }, 3 , 2 , 1 , 0 , -1 , -2 , -3 , true, false, null, ] }, \"key5\"" " : true }, \"key6\" : [ \"☃\" ], key7 : \"val\",}", true); } TEST_VM(utilities, json_key_values_2) { JSON_GTest::test("/* comment */ { \"key1\" : { \"key2\" : { \"key3\" : [ \"elem1\", \"elem2\"," "{ \"key4\" : null }, 3 , 2 , 1 , 0 , -1 , -2 , -3 , true, false, null, ] }, \"key5\"" " : true }, \"key6\" : [ \"☃\" ], key7 : \"val\",}", true); } TEST_VM(utilities, json_quoted_symbols) { JSON_GTest::test("/*comment*/{\"ff1 fsd\":{\"☃\":{\"☃\":[\"☃\",\"☃\"]}," "\"☃\":true},\"☃\":[\"☃\"],\"foo\":\"☃\",}", true); } TEST_VM(utilities, json_incorrect_key) { JSON_GTest::test("/* comment */ { key1 error : { \"☃\" : { \"☃\" : [ \"☃\"," " \"☃\" ] }, \"☃\" : true }, \"baz\" : [ \"☃\" ], foo : \"☃\",}", false); // first key needs to be quoted since it contains a space }
改成：
TEST_VM(utilities, json_key_values_1) { JSON_GTest::test("/* comment */{ key1 : { \"key2\" : { \"key3\" : [ \"elem1\", \"elem2\"," "{ \"key4\" : null }, 3 , 2 , 1 , 0 , -1 , -2 , -3 , true, false, null, ] }, \"key5\"" " : true }, \"key6\" : [ \"☃\" ], key7 : \"val\",}", true); } TEST_VM(utilities, json_key_values_2) { JSON_GTest::test("/* comment */ { \"key1\" : { \"key2\" : { \"key3\" : [ \"elem1\", \"elem2\"," "{ \"key4\" : null }, 3 , 2 , 1 , 0 , -1 , -2 , -3 , true, false, null, ] }, \"key5\"" " : true }, \"key6\" : [ \"☃\" ], key7 : \"val\",}", true); } TEST_VM(utilities, json_quoted_symbols) { JSON_GTest::test("/*comment*/{\"ff1 fsd\":{\"☃\":{\"☃\":[\"☃\",\"☃\"]}," "\"☃\":true},\"☃\":[\"☃\"],\"foo\":\"☃\",}", true); } TEST_VM(utilities, json_incorrect_key) { JSON_GTest::test("/* comment */ { key1 error : { \"☃\" : { \"☃\" : [ \"☃\"," " \"☃\" ] }, \"☃\" : true }, \"baz\" : [ \"☃\" ], foo : \"☃\",}", false); // first key needs to be quoted since it contains a space }
就是把一个特殊符号，用三个特殊的代替。
在word中插入特殊符号，选择拉丁语扩充-B
