Inlay parameter hints don't account for trailing required parameters

🔎 Search Terms

inlay hints parameters rest spread argument

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

N/A

💻 Code

/// <reference path="fourslash.ts" />

//// function test(...rest: [first: number, ...middle: string[], last: string]) {}
//// test(10, 'a', 'b', 'c')

verify.baselineInlayHints(undefined, {
  includeInlayParameterNameHints: "all",
  includeInlayFunctionParameterTypeHints: true,
});

🙁 Actual behavior

function test(...rest: [first: number, ...middle: string[], last: string]) {}
test(/* first: */10, /* ...middle: */'a', /* last: */'b', 'c')

🙂 Expected behavior

function test(...rest: [first: number, ...middle: string[], last: string]) {}
test(/* first: */10, /* ...middle: */'a', 'b', /* last: */'c')

Additional information about the issue

No response

Start with the supplied fourslash test and the verify.baselineInlayHints call, then trace the TypeScript inlay-hints handling for tuple rest parameters with trailing required elements. Update the regression coverage so the expected baseline matches the shown output, and run the relevant fourslash or inlay-hints tests to confirm the trailing argument is labeled correctly.