Make `Thread#join` non-blocking.

1 files changed, 5 insertions, 0 deletions

diff --git a/spec/ruby/core/thread/join_spec.rb b/spec/ruby/core/thread/join_spec.rb
index f3c5cdc1ed..6477e17b6e 100644
--- a/spec/ruby/core/thread/join_spec.rb
+++ b/spec/ruby/core/thread/join_spec.rb
@@ -19,8 +19,13 @@ describe "Thread#join" do
     t.join(0).should equal(t)
     t.join(0.0).should equal(t)
     t.join(nil).should equal(t)
+  end
+
+  it "raises TypeError if the argument is not a valid timeout" do
+    t = Thread.new {sleep}
     -> { t.join(:foo) }.should raise_error TypeError
     -> { t.join("bar") }.should raise_error TypeError
+    t.kill
   end
 
   it "returns nil if it is not finished when given a timeout" do