Environment details

• OS: macOS 10.13.6 (17G3025)
• Node.js version: v8.11.4
• npm version: 6.6.0
• @google-cloud/debug-agent version: ^3.0.1

Steps to reproduce

1. Using webpack build .ts code to .js and generate .js.map by using webpack config

dev-tool: source-map

2. Deploy to GAE standard environment

When I set a breakpoint at .ts file, the breakpoint does not trigger.

I try using tsc to compiled my source code, generate .js and .js.map. After deploying, the cloud-debug works fine.

Here is the repo for reproduce the issue: https://github.com/mrdulin/nodejs-gcp/tree/master/src/stackdriver/debug-web-server-transpiled-code