Help request: clang-tidy does not work

I use two folder workspace in vscode with the following settings:

    "settings": {
        "C_Cpp.autocomplete": "Disabled",
        "C_Cpp.errorSquiggles": "Disabled",
        "C_Cpp.intelliSenseEngine": "Disabled",
        "clangd.arguments": [
            "--log=verbose",
            "--pretty",
            "--background-index",
            "--compile-commands-dir=/tmp/build-dir/build",
            "--clang-tidy",
            "-j=2"
        ],
        "clangd.path": "/usr/local/bin/clangd",
        "editor.tabSize": 2,
        "terminal.integrated.tabs.enabled": false
    }

[dot]clang-tidy file is located only in one of the folders. My operating system is

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.6 LTS
Release:        18.04
Codename:       bionic

I downloaded pre-built clangd binary from here, this is the version:

clangd --version
clangd version 13.0.0 (https://github.com/llvm/llvm-project d7b669b3a30345cfcdb2fde2af6f48aa4b94845d)
Features: linux+grpc
Platform: x86_64-unknown-linux-gnu

Could you please help me out why clang-tidy seem to be not used completely? I don’t know how I can diagnose this on my own…

[HighCommander4]

I get the user-after-move warning on the provided example code.

[sam-mccall]

I think the warning you’re looking for is from the use-after-move check. This check is disabled in clangd because it relies on clang’s CFG infrastructure, which is believed/known to be crash-happy on broken code.