Unused named function paramater causes `rescript build -w` to enter an infinite loop

[tom-sherman]

The following module causes ReScript's watch mode to enter an infinite loop

@genType
let y = 5

let x = (a, ~b) => a

Repro:

1. Checkout https://github.com/tom-sherman/rescript-watch-infinite-loop-bug
2. npm i
3. npm start

Removing or using the unused param stops the loop.

[a-c-sreedhar-reddy]

Hey @tom-sherman I tried your repo and watch mode did not enter an infinite loop.

[tom-sherman]

@a-c-sreedhar-reddy what OS? I'm on macOS 11.6

[a-c-sreedhar-reddy]

yeah I am also on macOS 11.6

[tom-sherman]

https://user-images.githubusercontent.com/9257001/147350957-f5aaaacd-3a70-4770-8173-987042677a44.mov

Very strange...

Node 16.9.1, npm 7.21.1

[a-c-sreedhar-reddy]

Node v14.18.0 npm 6.14.15

[cristianoc]

Caused by an interaction of generatedFileExtension": ".gen.ts" and the compilers watcher. There was an issue on this already, which has moved to the compiler repo.

[ryyppy]

This repository is being archived. If you feel like the issue still relevant, please re-create it in the compiler repo. Thanks!