Fix tab creation when current buffer contains no file

python3/vimspector/debug_session.py

@@ -457,7 +457,7 @@ class DebugSession( object ):
 
 
   def _SetUpUI( self ):
-    vim.command( 'tabedit %' )
+    vim.command( 'tab split' )
     self._uiTab = vim.current.tabpage
 
     # Code window

support/test/python/simple_python/.vimspector.json

@@ -50,6 +50,23 @@
         }
       }
     },
+    "run - main.py": {
+      "adapter": "debugpy",
+      "configuration": {
+        "request": "launch",
+        "type": "python",
+        "cwd": "${workspaceRoot}",
+        "program": "${workspaceRoot}/main.py",
+        "stopOnEntry": false,
+        "console": "integratedTerminal"
+      },
+      "breakpoints": {
+        "exception": {
+          "raised": "N",
+          "uncaught": ""
+        }
+      }
+    },
     "run - exception question": {
       "adapter": "debugpy",
       "configuration": {