Angular source map location detection failure

[buu700]

Running my Angular CLI project (Angular 4.1.3, CLI 1.0.3) on Chrome 58, stacktrace.js gets confused about the locations of the relevant source map files.

Instead of requesting the correct paths (/main.js.map, /vendor.js.map, etc.), it sends out a handful of failed requests for what appear to be the names of my original TypeScript source files with the extension changes to .js.map, before giving up and returning a non-source-mapped stack trace.