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

https://github.com/less/less.js/blob/dc3a3105300930e2df14062fcf3de97d43db61b0/packages/less/src/less/tree/ruleset.js#L501
https://github.com/less/less.js/blob/dc3a3105300930e2df14062fcf3de97d43db61b0/packages/less/src/less/tree/debug-info.js#L1

Found this issue when trying to use less from the source. This works in dist because the class is compiled into a function.

### 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

By default the compiler prints any JSON output in a compact form:

echo "contract C {}" | solc - --combined-json abi

{"contracts":{"<stdin>:C":{"abi":[]}},"version":"0.8.6+commit.11564f7e.Linux.g++"}

You can use --pretty-json option to get nicely indented output from --combined-json option:

echo "contract C {}" | solc - --combined-json abi --pretty

The lack of support for concurrency primitives like this makes it difficult to write cross-platform code. The implementation should be trivial.