"Debug adapter process has terminated unexpectedly" when debugging on window used mingw gdb

OS: WIN7 64BIT
VSCODE: 1.19.1
MINGW: 0.6.2 GDB: 7.6.1

i can compile and debug use g++ and gdb on windows console.

but when i using vscode and c++ plugin for debug, it was always said "Debug adapter process has terminated unexpectedly" !
i still try with restart vscode and windows, but nothing change

it's my launch.json
{
"version": "0.2.0",
"configurations": [
{
"name": "C++ Launch (GDB)",
"type": "cppdbg",
"request": "launch",
"targetArchitecture": "x86", // i had try x86, x64, x86_64, still the same error
"program": "d:\workspace\test\test.exe",
"windows": {
"MIMode": "gdb",
"miDebuggerPath": "gdb.exe" // gdb path is in my windows environment variable
},
"args": [],
"environment": [],
"stopAtEntry": false,
"cwd": "d:\workspace\test\",
"externalConsole": false,
"preLaunchTask": "g++",
"logging": { "engineLogging": true }
}
]
}

also nothing log output.
any suggest?
thank you for help.

Start with the supplied launch.json on Windows 7, checking the windows MIMode, miDebuggerPath, targetArchitecture, and preLaunchTask settings. Reproduce the failure while examining the configured engine logging and gdb.exe resolution; done means the C++ debug session launches successfully in VS Code rather than terminating unexpectedly.