VSCode中Clangd服务处理std::ranges::count_if时崩溃

问题描述 #

当VSCode中的Clangd服务尝试解析包含特定代码行的文件时，会持续崩溃。该行代码用于统计UTF-8字符串中除续字节外的字符数量，崩溃现象与文件其他内容无关。

可复现代码片段 #

return (wide ? wide_ulen(str) : std::ranges::count_if(str, [](char c) { return (static_cast<unsigned char>(c) & 0xC0) != 0x80; }));

日志信息 #

以下是开启--log=verbose参数后获取的Clangd日志：

I[15:44:33.191] <-- textDocument/documentSymbol(4)
I[15:44:33.827] --> textDocument/publishDiagnostics
[Error - 15:44:35] The Clang Language Server server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
[Error - 15:44:35] Request textDocument/documentSymbol failed.
[object Object]
[Error - 15:44:35] Request textDocument/documentLink failed.
[object Object]
[Error - 15:44:35] Request textDocument/codeAction failed.
[object Object]
[Error - 15:44:35] Request textDocument/documentSymbol failed.
[object Object]
[Error - 15:44:35] Request textDocument/codeAction failed.
[object Object]

系统信息 #

• Clangd版本：clangd version 10.0.0-4ubuntu1
• Clangd扩展版本：v0.1.28
• 操作系统：Ubuntu Linux 20.04

VSCode报告的错误 #

• vscode source:clangd：与服务器的连接已关闭，服务器将不再重启。
• Client Clang Language Server：与服务器的连接出现错误，正在关闭服务器。

内容的提问来源于stack exchange，提问作者yuzhan wang