CAT 013

CAT-013 — TCPSocket resource leak

Severity: error • Confidence: high • Auto-fix: ❌

Warning

This rule flags real bugs, not just performance issues.

Description

TCPSocket resource leak — TCPSocket must be closed after use. Use a block form or ensure close is called in a ensure block.

Bad code

sock = TCPSocket.new("example.com", 80)
sock << "GET / HTTP/1.0"

Performance Impact

Tip

This rule can significantly improve performance in hot code paths.

Benchmark

Note

See bench results at bench/cat-013/