Broken syntax highlighting for generic function with optional type in Typescript JSX

[IsaacAbrahamson]

Type: Bug

Inside of a new .tsx file, create the following code:

type GenericType<T> = boolean;

const testGeneric = <T = void,>(): GenericType<T> => {
  return true;
};

const testGeneric2 = <T,>(): GenericType<T> => {
  return true;
};

Every => after the <T = void,> will be incorrectly highlighted.

VS Code version: Code 1.75.1 (Universal) (441438abd1ac652551dbe4d408dfcec8a499b8bf, 2023-02-08T21:34:59.000Z)
OS version: Darwin arm64 22.2.0
Modes:
Sandboxed: No

System Info

Item	Value
CPUs	Apple M1 Pro (8 x 24)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	2, 2, 2
Memory (System)	16.00GB (0.09GB free)
Process Argv	--crash-reporter-id b866acdc-8967-448e-b6c1-00876386ce17
Screen Reader	no
VM	0%

Extensions (20)

Extension	Author (truncated)	Version
vscode-tailwindcss	bra	0.9.7
vscode-eslint	dba	2.4.0
vsc-material-theme-icons	equ	2.5.0
prettier-vscode	esb	9.10.4
git-graph	mhu	1.30.0
theme-monokai-pro-vscode	mon	1.2.0
vscode-docker	ms-	1.24.0
isort	ms-	2022.8.0
python	ms-	2023.2.0
vscode-pylance	ms-	2023.2.40
jupyter	ms-	2023.1.2010391206
jupyter-keymap	ms-	1.0.0
jupyter-renderers	ms-	1.0.14
vscode-jupyter-cell-tags	ms-	0.1.6
vscode-jupyter-slideshow	ms-	0.1.5
code-spell-checker	str	2.17.1
vscode-stylelint	sty	1.2.4
vscode-icons	vsc	12.2.0
gitblame	wad	10.1.0
vscode-todo-highlight	way	1.0.5

(6 theme extensions excluded)

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