fix: debugging requires a non empty debug.executable

Author: pillo79

commands/debug/debug_info.go

@@ -140,7 +140,7 @@ func getDebugProperties(req *rpc.GetDebugConfigRequest, pme *packagemanager.Expl
 		}
 	}
 
-	if !debugProperties.ContainsKey("executable") {
+	if !debugProperties.ContainsKey("executable") || debugProperties.Get("executable") == "" {
 		return nil, &arduino.FailedDebugError{Message: tr("Debugging not supported for board %s", req.GetFqbn())}
 	}
 

docs/UPGRADING.md

@@ -2533,6 +2533,8 @@ debug.server.openocd.scripts_dir={runtime.tools.openocd-0.10.0-arduino7.path}/sh
 debug.server.openocd.script={runtime.platform.path}/variants/{build.variant}/{build.openocdscript}
 ```
 
+The `debug.executable` key must be present and non-empty for debugging to be supported.
+
 The `debug.server.XXXX` subkeys are optional and also "free text", this means that the configuration may be extended as
 needed by the specific server. For now only `openocd` is supported. Anyway, if this change works, any other kind of
 server may be fairly easily added.