[WSL] Unable to launch /usr/bin/gdb when setting bash.exe as the integrated shell in VS Code.

I'm unable to launch WSL's installation of gdb when using Visual Studio Code on Windows.

I received an "invalid path" error when I specified this in my launch.json file:

"miDebuggerPath" : "/usr/bin/gdb"

I received an "invalid binary" error when I instead specified this in my launch.json file:

"miDebuggerPath": "/Users/dougdew/AppData/Local/Packages/CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc/LocalState/rootfs/usr/bin/gdb",

I'm running Windows 10 v1803, WSL, Ubuntu 18.04, VS Code v1.29 and C/C++ Extension v0.20.1

I have no other extensions installed.

To reproduce the bug:

1. Install WSL and Ubuntu 18.04

2. Install VS Code

3. Configure VS Code to use the bash shell by adding this to settings:

"terminal.integrated.shell.windows": "C:\WINDOWS\sysnative\bash.exe"

4. Create directory for cpp project (e.g. /mnt/c/Users/dougdew/Documents/Projects/cpp1)

5. Create *.cpp file (e.g. main.cpp)

6. Create tasks.json file with task to build a.out.

7. Create launch.json file with miDebuggerPath for gdb

8. Create c_cpp_properties.json file