<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/60994>60994</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            lldb cannot print std::string
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          fonqL
      </td>
    </tr>
</table>

<pre>
    OS: Ubuntu 22.04
```shell
$ clang -v
Ubuntu clang version 15.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$ lldb --version
lldb version 15.0.6
```

main.cpp

```cpp
#include <iostream>
#include <vector>
using namespace std;

int main(int argc, char **argv) {
  int a = 0;
  std::string s = "1234555";
 std::vector<int> c{1, 2, 3, 4, 5};

  s[0] = '9';
  std::cout << s;
}
```

Compile:

```shell
$ g++ -g -O0 main.cpp -o gcc_out
$ clang++ -g -O0 main.cpp -o clang_out
```

**lldb can print std::string when using gcc_out, but shows error when using clang_out.**

```
(lldb) print s
error: expression failed to parse:
error: <user expression 0>:1:1: incomplete type 'std::string' (aka 'std::basic_string<>') where a complete type is required
s
^
```

When using Codelldb to debug in VScode, it shows `error: summary string parsing error`

I know a workaround is to add `-fstandalone-debug` flag, but that's a bit annoying.
Another solution is install a debug version of libstdc++. I think I have already installed it.
I wonder if there is another way to solve it.

```shell
$ dpkg --list|grep libstdc++
ii  libstdc++-11-dev:amd64 11.3.0-1ubuntu1~22.04                   amd64        GNU Standard C++ Library v3 (development files)
ii  libstdc++-12-dev:amd64 12.1.0-2ubuntu1~22.04                   amd64        GNU Standard C++ Library v3 (development files)
ii  libstdc++-12-doc 12.1.0-2ubuntu1~22.04                   all          GNU Standard C++ Library v3 (documentation files)
ii  libstdc++6:amd64 12.1.0-2ubuntu1~22.04                   amd64        GNU Standard C++ Library v3
ii  libstdc++6-12-dbg:amd64              12.1.0-2ubuntu1~22.04 amd64        GNU Standard C++ Library v3 (debug build)
```

</pre>
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