:%! truncates the file

[smolin]

Type: Bug

Start with a large file, like /usr/share/dict/words. Check the file length in lines, 235976 in my case.

In the VS Code editor with vim plugin active, enter :%!cat which should have no effect on the buffer.

Notice that the file length is now much shorter - 100826 lines in my case.

Extension version: 1.27.3
VS Code version: Code 1.90.0 (Universal) (89de5a8d4d6205e5b11647eb6a74844ca23d2573, 2024-06-04T19:34:44.157Z)
OS version: Darwin x64 23.5.0
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 x 2600)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	2, 2, 2
Memory (System)	16.00GB (0.01GB free)
Process Argv
Screen Reader	no
VM	0%