TypeScript Version: nightly (2.2.0-dev.20161118)

Chrome Version: Stable 54.0.2840.99 (Official Build) m (64-bit) (Revision 7eca4ce1e662f12cadaf96c30cd2335fd03e7140-refs/branch-heads/2840@{#830})

TypeScript Code:

function work() {
  return Promise.resolve(67);
}

async function method() {
  var number = await work();
  console.log(number);
}

debugger; method();

GIF of Issue:

Expected behavior:

Stepping into method() on Chrome should step into the original TypeScript file just a few lines up.

Actual behavior:

Stepping into method() on Chrome steps into the generated ES5 JavaScript file.

Instructions to Reproduce:

1. Download the self-contained project at my Google Drive link: https://goo.gl/8tmMXh (GitHub did not allow me to upload a .ZIP file).
2. Open index.html and follow the instructions on-screen.

Possibly related to:

• Chromium Bug: Step-over does not understand yield statements in generators
• Unexpected step over/into behavior in files using async/await #5888