GoogleTest EXPECT_EXIT测试失败：报告未触发的退出码问题

为测试函数传入特定参数时不会崩溃，编写了Google Test死亡测试代码：

EXPECT_EXIT({ cm.insert(-1, 0, &pt, 0); exit(0); }, ::testing::ExitedWithCode(0), ".*")

测试失败，报错信息：

Death test: { cm.insert(-1, 0, &pt, 0); exit(0); }
Result: died but not with expected exit code:
Exited with exit status 23 Actual msg: [ DEATH ]

进一步排查，执行以下最简测试代码仍出现相同报错：

EXPECT_EXIT(exit(0), ::testing::ExitedWithCode(0), ".*");

移除其他依赖库后测试可正常运行，确认问题由引入的其他库导致，原测试问题已无关。

内容的提问来源于stack exchange，提问作者Mikhail Tsaritsyn