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-rw-r--r--test/ruby/test_io.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 1960166393..9d0e5bc411 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1360,6 +1360,7 @@ class TestIO < Test::Unit::TestCase
def test_readpartial_lock
with_pipe do |r, w|
s = ""
+ r.nonblock = false if have_nonblock?
t = Thread.new { r.readpartial(5, s) }
Thread.pass until t.stop?
assert_raise(RuntimeError) { s.clear }