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Intermittent failure on duped pipe tests JDK 19+ #7909

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Intermittent failure on duped pipe tests JDK 19+#7909
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JDK compatibilitycore
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JRuby 10.0.0.0
@headius

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@headius
headius
opened on Aug 29, 2023

The following tests from CRuby fail intermittently on JDK 19+. I have not dug deep enough to know what is failing, nor bisected OpenJDK to find what commit changed this behavior.

jruby/test/mri/ruby/test_io_m17n.rb

Lines 374 to 404 in 2d100bb

def test_dup
pipe("utf-8:euc-jp",
proc do |w|
w << "\u3042"
w.close
end,
proc do |r|
r2 = r.dup
begin
assert_equal("\xA4\xA2".force_encoding("euc-jp"), r2.read)
ensure
r2.close
end
end)
end
def test_dup_undef
pipe("utf-8:euc-jp", { :undef=>:replace },
proc do |w|
w << "\uFFFD"
w.close
end,
proc do |r|
r2 = r.dup
begin
assert_equal("?", r2.read)
ensure
r2.close
end
end)
end

I have no theories. I will be excluding these on JDK 19 and higher for now but we need to investigate this.

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