Editing classes lead to odd results

[st-schneider]

Issue Type: Bug

I made a copy of a class to extend it and deleted it contents resulting in this odd display.

Extension version: 0.2.1
VS Code version: Code - Insiders 1.47.0-insider (376d9d9d785ccca128fdbb16f001446d0ad64d32, 2020-07-03T10:26:01.724Z)
OS version: Darwin x64 18.7.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz (8 x 2800)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	9, 12, 10
Memory (System)	16.00GB (0.69GB free)
Process Argv
Screen Reader	no
VM	0%