tools/pack200/TimeStamp.java fails with NullPointerException

Subsequent to the fix for JDK-8067801 the test fails with an NPE:

java.lang.NullPointerException
at java.base/java.io.FilterInputStream.<init>(FilterInputStream.java:63)
at java.base/java.io.BufferedInputStream.<init>(BufferedInputStream.java:198)
at java.base/com.sun.java.util.jar.pack.PackageReader$LimitedBuffer.<init>(PackageReader.java:126)
at java.base/com.sun.java.util.jar.pack.PackageReader.<init>(PackageReader.java:67)
at java.base/com.sun.java.util.jar.pack.UnpackerImpl$DoUnpack.unpackSegment(UnpackerImpl.java:205)
at java.base/com.sun.java.util.jar.pack.UnpackerImpl$DoUnpack.run(UnpackerImpl.java:193)
at java.base/com.sun.java.util.jar.pack.UnpackerImpl.unpack(UnpackerImpl.java:110)
at java.base/com.sun.java.util.jar.pack.UnpackerImpl.unpack(UnpackerImpl.java:147)
at Utils.unpack0(Utils.java:463)
at Utils.unpackj(Utils.java:443)
at TimeStamp.unpackJava(TimeStamp.java:123)
at TimeStamp.main(TimeStamp.java:71)

java/net/URLConnection/ContentHandlers/ContentHandlersTest.java fails with a similar exception:

java.lang.RuntimeException: Exception in thread "main" java.lang.NullPointerException
at java.base/java.io.FilterInputStream.<init>(FilterInputStream.java:63)
at java.base/sun.net.www.content.text.PlainTextInputStream.&lt;init&gt;(PlainTextInputStream.java:45)
at java.base/sun.net.www.content.text.plain.getContent(plain.java:43)
at java.base/java.net.URLConnection.getContent(URLConnection.java:750)
at java.base/java.net.URL.getContent(URL.java:1166)
at Test.main(Test.java:64)

at ContentHandlersTest.step4_BuiltIn(ContentHandlersTest.java:175)
at ContentHandlersTest.main(ContentHandlersTest.java:68)