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Intermittent render-glitch for certain Unicode on Terminal #122776

@p-i-

Description

@p-i-

Issue Type: Bug

Sometimes certain Unicode characters fail to render correctly in the terminal.

See screenshot.

🔸 and 🐠 are rendering.
But ⚠️ isn't.

Usually it does, but occasionally not.
Restarting the terminal (or VSCode) fixes.

I notice ⚠️ won't render in-editor (but 🔸 and 🐠 do). Maybe it's related...?

VS Code version: Code 1.55.2 (3c4e3df, 2021-04-13T09:36:32.643Z)
OS version: Darwin x64 20.4.0

System Info
Item Value
CPUs Intel(R) Core(TM) i7-8559U CPU @ 2.70GHz (8 x 2700)
GPU Status 2d_canvas: enabled
gpu_compositing: enabled
metal: disabled_off
multiple_raster_threads: enabled_on
oop_rasterization: enabled
opengl: enabled_on
protected_video_decode: unavailable_off
rasterization: enabled
skia_renderer: disabled_off_ok
video_decode: enabled
webgl: enabled
webgl2: enabled
Load (avg) 2, 2, 2
Memory (System) 16.00GB (0.22GB free)
Process Argv --crash-reporter-id 208511c2-dba0-4576-b4d0-606dd0e49428
Screen Reader no
VM 0%
Extensions (27)
Extension Author (truncated) Version
rtf ale 2.2.0
bracket-pair-colorizer-2 Coe 0.2.0
dart-code Dar 3.21.1
flutter Dar 3.21.0
es7-react-js-snippets dsz 3.1.1
gitlens eam 11.4.1
php-debug fel 1.14.12
go gol 0.24.2
lldb-vscode lan 0.2.3
vscode-docker ms- 1.12.1
vscode-kubernetes-tools ms- 1.3.2
python ms- 2021.4.765268190
jupyter ms- 2021.5.745244803
remote-containers ms- 0.166.1
cmake-tools ms- 1.7.1
cpptools ms- 1.3.1
terraform-advanced-syntax-highlighting pjm 1.4.0
java red 0.79.0
vscode-yaml red 0.18.0
LiveServer rit 5.6.1
cmake twx 0.0.17
vscode-lldb vad 1.6.2
vscode-java-debug vsc 0.33.1
vscode-java-dependency vsc 0.18.3
vscode-java-pack vsc 0.14.0
vscode-java-test vsc 0.29.0
debug web 0.25.0
A/B Experiments
vsliv368cf:30146710
vsreu685:30147344
python383:30185418
vspyt653:30270858
pythonvspyt602cf:30294773
vspor879:30202332
vspor708:30202333
vspor363:30204092
vswsl492cf:30256860
vstry914:30276682
pythonvsnew554cf:30291488
pythontb:30283811
pythonvspyt551cf:30291415
vspre833cf:30267465
pythonptprofiler:30281270
vsdfh931:30280409
vshan820:30294714
vscoreces:30290705
pythondataviewer:30285071
vscus158:30286553

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