Merge pull request #100 from saraid/guarantee-level_override-existence

Guarantee level_override exists

Author: hsbt

lib/logger.rb

@@ -381,7 +381,7 @@ class Logger
 
  # Logging severity threshold (e.g. <tt>Logger::INFO</tt>).
  def level
- @level_override[Fiber.current] || @level
+ level_override[Fiber.current] || @level
  end
 
  # Sets the log level; returns +severity+.
@@ -406,14 +406,14 @@ def level=(severity)
  # logger.debug { "Hello" }
  # end
  def with_level(severity)
- prev, @level_override[Fiber.current] = level, Severity.coerce(severity)
+ prev, level_override[Fiber.current] = level, Severity.coerce(severity)
  begin
  yield
  ensure
  if prev
- @level_override[Fiber.current] = prev
+ level_override[Fiber.current] = prev
  else
- @level_override.delete(Fiber.current)
+ level_override.delete(Fiber.current)
  end
  end
  end
@@ -746,6 +746,11 @@ def format_severity(severity)
  SEV_LABEL[severity] || 'ANY'
  end
 
+ # Guarantee the existence of this ivar even when subclasses don't call the superclass constructor.
+ def level_override
+ @level_override ||= {}
+ end
+
  def format_message(severity, datetime, progname, msg)
  (@formatter || @default_formatter).call(severity, datetime, progname, msg)
  end