Switch to project directory before starting debugging process

platformio/commands/debug.py

@@ -150,12 +150,15 @@ def cli(ctx, project_dir, project_conf, environment, verbose, interface, __unpro
 
     loop = asyncio.ProactorEventLoop() if IS_WINDOWS else asyncio.get_event_loop()
     asyncio.set_event_loop(loop)
+
+    with fs.cd(project_dir):
         client = GDBClientProcess(project_dir, debug_config)
         coro = client.run(__unprocessed)
         try:
             loop.run_until_complete(coro)
             if IS_WINDOWS:
-            # an issue with asyncio executor and STIDIN, it cannot be closed gracefully
+                # an issue with `asyncio` executor and STIDIN,
+                # it cannot be closed gracefully
                 proc.force_exit()
         finally:
             del client