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-rw-r--r--io.c2
-rw-r--r--test/ruby/test_io.rb7
2 files changed, 8 insertions, 1 deletions
diff --git a/io.c b/io.c
index cb24b283d2..ebf5743d37 100644
--- a/io.c
+++ b/io.c
@@ -1678,7 +1678,7 @@ io_writev(int argc, VALUE *argv, VALUE io)
static VALUE
io_write_m(int argc, VALUE *argv, VALUE io)
{
- if (argc > 1) {
+ if (argc != 1) {
return io_writev(argc, argv, io);
}
else {
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index a271c9e677..43c3ed7566 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1287,6 +1287,13 @@ class TestIO < Test::Unit::TestCase
assert_empty(err)
end
+ def test_write_no_args
+ IO.pipe do |r, w|
+ assert_equal 0, w.write, '[ruby-core:86285] [Bug #14338]'
+ assert_equal :wait_readable, r.read_nonblock(1, exception: false)
+ end
+ end
+
def test_write_non_writable
with_pipe do |r, w|
assert_raise(IOError) do