Launching of custom GDB does not correctly set CWD (breaks relative paths)

I'm trying to debug an STM32 microcontroller through OpenOCD in VSCode 1.13.0 on Windows 10.

I have this launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "ARM GDB Launch",
            "logging": { "trace": true, "traceResponse": true, "engineLogging": true },
            "type": "cppdbg",
            "request": "launch",
            "args": [],
            "stopAtEntry": true,
            "cwd": "${workspaceRoot}",
            "environment": [],
            "externalConsole": true,
            "MIMode": "gdb",
            "program": "${workspaceRoot}/BUILD/DISCO_F407VG/GCC_ARM/tracker.elf",
            "windows": {
                "miDebuggerPath": "arm-none-eabi-gdb.exe"
            },
            "linux": {
                "miDebuggerPath": "arm-none-eabi-gdb"
            },
            "miDebuggerServerAddress": "localhost:3333",
            "targetArchitecture": "arm",
            "customLaunchSetupCommands": [
                {
                    "description": "Set remote target",
                    "text": "file BUILD/DISCO_F407VG/GCC_ARM/tracker.elf"
                },
                {
                    "description": "Set remote target",
                    "text": "target remote localhost:3333"
                },
                {
                    "description": "Set hardware breakpoints",
                    "text": "set remote hardware-breakpoint-limit 6"
                },
                {
                    "description": "Set hardware breakpoints",
                    "text": "set remote hardware-watchpoint-limit 4"
                },
                {
                    "description": "Reset 1",
                    "text": "monitor reset halt"
                },
                {
                    "description": "Load code",
                    "text": "load"
                },
                {
                    "description": "Reset 2",
                    "text": "monitor reset halt"
                }
            ]
        }
    ]
}

However, this doesn't work. I get the following error:

Unable to start debugging. Unexpected GDB output from command "-interpreter-exec console "file BUILD/DISCO_F407VG/GCC_ARM/tracker.elf"". BUILD/DISCO_F407VG/GCC_ARM/tracker.elf: No such file or directory.

However, the file is there, and if I use the full path, it works. (I do consider it bad practice to use full paths in any code, specially code that others might use).

Since it looked like a path problem, I launched SysInternals' Process Explorer and tried to find the arm-none-eabi-gdb.exe process. I found that its Current directory field is just empty! Screenshot:

One workaround that I found, at least until the bug is fixed, is to create a batch (.bat) with this content:

@arm-none-eabi-gdb.exe %*

Then I changed the miDebuggerPath setting to:

                "miDebuggerPath": "${workspaceRoot}/wingdb.bat"

Where wingdb.bat is the name of the file I just created.

Curiously, this does work, which suggests that VSCode is not properly setting the debugger's current directory properly.

Beginne mit der launch.json-Konfiguration, insbesondere mit cwd und miDebuggerPath, und reproduziere den Fehler mit dem relativen file-Befehl in customLaunchSetupCommands. Vergleiche den direkten Start von arm-none-eabi-gdb.exe mit dem wingdb.bat-Workaround. Erledigt ist es, wenn der Debugger-Prozess das vorgesehene aktuelle Verzeichnis erhält und den relativen tracker.elf-Pfad ohne vollständigen Pfad oder Wrapper auflöst.