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-rw-r--r--lib/timeout.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/timeout.rb b/lib/timeout.rb
index bf12f37382..c8c3d501b6 100644
--- a/lib/timeout.rb
+++ b/lib/timeout.rb
@@ -164,6 +164,7 @@ module Timeout
# Timeout</tt> into your classes so they have a #timeout method, as well as
# a module method, so you can call it directly as Timeout.timeout().
def timeout(sec, klass = nil, message = nil, &block) #:yield: +sec+
+ raise ArgumentError, "Timeout sec must be a positive number" unless sec.is_a?(Numeric) && sec >= 0
return yield(sec) if sec == nil or sec.zero?
message ||= "execution expired"