Broken syntax highlighting for multiline function args in typescript

[marvinhagemeister]

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• VSCode Version: 1.14.0-insider d5e10a5
• OS Version: MacOS Sierra 10.12.5

Steps to Reproduce:

1. open vscode
2. paste this snippet:

export const toPdf = (renderer: Renderer) => <P>(
  document: Doc<P>,
): Promise<string> => {
  return renderer(document.html, document.config);
};

// compared to
export const toPdf = (renderer: Renderer) => <P>(document: Doc<P>): Promise<string> => {
  return renderer(document.html, document.config);
};

[umarashfaq]

Syntax Highlighting is fine when first arg appears right after opening parenthesis:

But when you take first arg to next line, here's what happens:

Everything below line 94 turns white.

[mjbvz]

This issue was moved to microsoft/TypeScript-TmLanguage#481