Suggestion

I suggest a better error message telling that arguments is a reserved keyword or something that cannot be used in TS in strict mode.

✅ Viability Checklist

According to documentation https://lesscss.org/functions/#color-definition-hsl
hsl() function should output a color, but it does not. rgb() and hsv() behave as documented.

$ npx lessc --version
lessc 4.1.1 (Less Compiler) [JavaScript]
$ cat problem.less 
.problem {
  color: rgb(128, 255, 0);
  background-color: hsl(90, 100%, 50%);
  border-color: hsv(90, 100%, 50%);
}
$ npx lessc pr

### Example
let unreachableProxy = "http://127.0.0.1:8888"
try:
  let client = newHttpClient(proxy=newProxy(unreachableProxy), timeout=1)
  var res = client.getContent("https://github.com")
  echo res
except:
  echo "Timed out"

Current Output

timeout variable is ignored, program stuck until default socket timeout will happen

Expected Output

Timed out a

Looks like soldity-upgrade has input file processing logic duplicated from CommandLineInterface.cpp. Especially readInputFiles() and file reader callback in SourceUpgrade.cpp. This logic in CommandLineInterface has recently been refactored in PRs like #11113, #11518. After #11545/#11617

It would be useful to have a java.util.BitSet implementation. It looks like most Java collections are available but this one fell through the cracks (perhaps because it's not part of the Collection hierarchy).