duplicate rename bug workaround?

[gvolpe]

I've run into #4463 and now I'm unable to run my application. Is there a known workaround to get past this issue? Maybe clear some cache or something in ucm? Running ucm v0.5.49.

The project is this one: https://share.unison-lang.org/@gvolpe/gig

$ ucm

$ gig/main> run deploy.local 

  ❗️
  
  Sorry – I've encountered a bug in the Unison runtime.
  
    renameTo: duplicate rename
  
  Please check if one of these known issues matches your situation:
  
  * https://github.com/unisonweb/unison/issues/3625
  * `renameTo: duplicate rename` pattern matching bug prevents ability to add/update functions
    https://github.com/unisonweb/unison/issues/ 4463
  
  If not, please open a new one: https://github.com/unisonweb/unison/issues/new/choose

[pchiusano]

Sorry about this. We'll prioritize fixing. Here's a PR for your project that fixes the issue - https://share.unison-lang.org/@gvolpe/gig/contributions/1 the culprit was http.setlistfm which I found by telling Claude Code about the bug and then asking it to examine all the definitions in the project for problematic instances. It had a couple false positives (it doesn't seem to understand valid variable shadowing exactly) but the http.setlistfm was in the list.

[gvolpe]

Oh wow, thank you so much! I tried looking for duplicate variable names in the codebase, but it's hard to pin-point it 😅