"Unexpected resource git:" when using workspace symbol search in left side of git split diff editor

[mjbvz]

Issue Type: Bug

Repo

1. In a git repo
2. Make a change in a js or ts file
3. Open a split diff view from the git changes
4. Click into the left editor
5. Trigger workspace symbol search with cmd+t

Bug

No symbols are found. In the dev tools console, see:

For split diff views, I believe that workspace symbol search should just use the right editor instead

VS Code version: code-oss-dev 1.36.0 (Commit unknown, Date unknown)
OS version: Darwin x64 18.6.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: enabled skia_deferred_display_list: disabled_off skia_renderer: disabled_off surface_synchronization: enabled_on video_decode: enabled viz_display_compositor: disabled_off webgl: enabled webgl2: enabled
Load (avg)	3, 3, 4
Memory (System)	16.00GB (0.82GB free)
Process Argv	.
Screen Reader	no
VM	29%

[alexdima]

cmd+T is workbench.action.showAllSymbols

[roblourens]

Why is this on me?