Disposable Not Disposed (ARCH6080)

Key ruby.performance.disposable-not-disposed · Severity error · Category performance

A closeable resource created without the block form is left open and leaks if an exception is raised. Wrap the resource in the block form so it closes automatically.

Incorrect

def write_report(path, data)
  file = File.open(path, "w")
  file.write(data)
  file.close
end

Correct

def write_report(path, data)
  File.open(path, "w") do |file|
    file.write(data)
  end
end

Fix

Wrap the resource in the block form instead of opening and closing it manually; it closes when the block ends.