URLConnection.setRequestProperty throws IllegalAccessError

A DESCRIPTION OF THE PROBLEM :
The method URLConnection.setRequestProperty(String, String) throws an IllegalAccessError. This appears to be an ancient remnant which was apparently missed by JDK-4082758.

The expected exception type is an IllegalStateException.


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// On Windows:
URLConnection c = new URL("file:///C:/").openConnection()
c.connect()
c.setRequestProperty("test", "test")
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