ubuntu 20.04 vscode c/c++ launch始终提示文件不存在

Question

我在ubuntu 20.04下安装了vscode ,gcc和gdb都存在，安装了c/c++插件，按照网上教程配置了task.json和launch.json文件，但是很奇妙的是有些cpp文件可以顺利运行，但是有的不可以运行。这次由于一个文件使用了thread，导致再次编译失败，提示:launch:program '项目路径' does not exit.

launch.json

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [

    {
        "name": "g++ - Build and debug active file",
        "type": "cppdbg",
        "request": "launch",
        "program": "${fileDirname}/${fileBasenameNoExtension}",
        "args": [],
        "stopAtEntry": false,
        "cwd": "${fileDirname}",
        "environment": [],
        "externalConsole": false,
        "MIMode": "gdb",
        "setupCommands": [
            {
                "description": "Enable pretty-printing for gdb",
                "text": "-enable-pretty-printing",
                "ignoreFailures": true
            }
        ],
        "preLaunchTask": "C/C++: g++ build active file",
        "miDebuggerPath": "/usr/bin/gdb"
    }
]

}

task.json
{
"version": "2.0.0",
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: g++ build active file",
"command": "/usr/bin/g++",
"args": [
"-g",
"${file}",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
},
"detail": "compiler: /usr/bin/g++"
}
]
}

希望能有人帮我解决这个问题，感谢。