Source maps broken under Windows since 8.10.0 (ESM support)

[shunf4]

Expected Behavior

Source maps work under Windows 10 in 8.10.0 and later versions.

Actual Behavior

Source maps are broken under Windows 10 since 8.10.0 (ESM support). Under GNU/Linux it works well.

Steps to reproduce the problem

test.ts:

function main() {






  throw new Error("aaa")
  console.log(1)
  console.log(1)
  console.log(1)
  console.log(1)
  console.log(1)
  console.log(1)
}

main()

Running ts-node test.ts should always give output like this:

  throw new Error("aaa")
        ^
Error: aaa
    at main (C:\Users\User\Desktop\test.ts:8:9)
    at Object.<anonymous> (C:\Users\User\Desktop\test.ts:17:1)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Module.m._compile (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\index.ts:839:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Object.require.extensions.<computed> [as .ts] (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\index.ts:842:12)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at main (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\bin.ts:227:14)

When running under Windows 10, ts-node 8.10.0 and later give:

Error: aaa
    at main (C:\Users\User\Desktop\test.ts:2:11)
    at Object.<anonymous> (C:\Users\User\Desktop\test.ts:10:1)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Module.m._compile (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\index.ts:858:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Object.require.extensions.<computed> [as .ts] (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\index.ts:861:12)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at main (C:\Users\User\AppData\Roaming\npm\node_modules\ts-node\src\bin.ts:227:14)

The line number do not correspond to the .ts file. The source map is broken.

Minimal reproduction

See "Steps to reproduce the problem".

Specifications

• ts-node version: v8.10.0 and later
• node version: v12.13.0 and v14.2.0
• TypeScript version: v3.8.3
• tsconfig.json, if you're using one: None
• Operating system and version: Windows 10 Version 1909 (OS Build 18363.752)
• If Windows, are you using WSL or WSL2?: No

[cspotcode]

Thanks for the detailed report. I'm able to reproduce this and confirm it broke on ts-node 8.10. 8.9.1 still works.

[cspotcode]

Found the bug. We started normalizing to / path separators internally, but we are not doing that when looking up items in outputCache.

[cspotcode]

@shunf4 once the fix passes code review, I'll publish a new release.