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✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be impleme

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

This would increase readability in bigger tests, such as those in semanticTests/externalContracts.

// -- Double reserve
// account: 1
// reserve(string), 69 ether: 0x20, 3, "abc" ->
// owner(string): 0x20, 3, "abc" -> 0x1212121212121212121212121212120000000012
// account: 0
// -- Transfer
// setContent(string,bytes32): 0x40, 0, 3, "abc" ->
// transfer(string,address): 0x40, 555, 3

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