C++ 异常未在 clang 17.0.3 上捕获-解网

问：

这是我今天遇到的一个错误的简化版本。

#include <iostream>
#include <vector>
#include <stdexcept>

void run() {
    std::vector<int> v;
    throw std::runtime_error("error");
}

int main() {
    try {
        run();
    } catch (const std::exception &e) {
        std::cerr << e.what() << std::endl;
        return 1;
    }

    return 0;
}

我在 M1 Mac 上使用 Homebrew clang 版本 17.0.3 编译并运行了这段代码：

clang++ -std=c++20 -o main main.cpp

未捕获异常，程序退出时显示：

Process finished with exit code 133 (interrupted by signal 5: SIGTRAP)

如果我从 run 函数中删除或在 Linux 上编译它，那么它就可以工作了。std::vector<int> v;

编辑：所以，我最初是使用 cmake 通过 CLion 编译的，它还添加了 .-L/opt/homebrew/opt/llvm/lib

我测试了它手动编译，结果：

# works
clang++ -std=c++20 -o main main.cpp

# crashes with c++11, c++17 and c++20
clang++ -std=c++20 -O0 -o main -L/opt/homebrew/opt/llvm/lib main.cpp

# works
clang++ -std=c++20 -O1 -o main -L/opt/homebrew/opt/llvm/lib main.cpp

生成的程序集文件：https://drive.google.com/drive/folders/13UKnC0mp6_3l_QULO62ts_UQHK1ZR23u?usp=share_link

我的猜测是 -O1 只是剥离了创建向量，因为添加更多代码以确保它被保留会导致陷阱。

在中创建一个空类，该类具有打印某些内容的析构函数也会导致同样的问题。run()

C++ macOS 异常叮当 C++20

==> Caveats
To use the bundled libc++ please add the following LDFLAGS:
  LDFLAGS="-L/opt/homebrew/opt/llvm/lib/c++ -Wl,-rpath,/opt/homebrew/opt/llvm/lib/c++"

llvm is keg-only, which means it was not symlinked into /opt/homebrew,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

If you need to have llvm first in your PATH, run:
  echo 'export PATH="/opt/homebrew/opt/llvm/bin:$PATH"' >> ~/.zshrc

For compilers to find llvm you may need to set:
  export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
  export CPPFLAGS="-I/opt/homebrew/opt/llvm/include"

使用代码按预期运行。-L/opt/homebrew/opt/llvm/lib/c++

C++ 异常未在 clang 17.0.3 上捕获

C++ Exception not caught on clang 17.0.3

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