HttpURLConnection.getHeaderFields() throwing java.lang.NullPointerException with
build75. Same test passed with build 74.

Exception message:

ERROR: GetURLInfo.main(): exception occurred:
java.lang.NullPointerException
java.lang.NullPointerException
        at java.util.Collections$UnmodifiableCollection.<init>(Collections.java:974)
        at java.util.Collections$UnmodifiableList.<init>(Collections.java:1126)
        at java.util.Collections.unmodifiableList(Collections.java:1112)
        at sun.net.www.MessageHeader.getHeaders(MessageHeader.java:130)
        at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(HttpURLConnection.java:1027)
        at GetURLInfo.printAllHeaderFields(GetURLInfo.java:269)
        at GetURLInfo.PrintURLInfo(GetURLInfo.java:232)
        at GetURLInfo.main(GetURLInfo.java:64)


How to reproduce it:
====================

1.Take the attached GetURLInfo.java and GetURLInfo.data

2. Execute as follows
java -DproxyHost=webcache.east.sun.com -DproxyPort=8080 GetURLInfo -f GetURLInfo.data -o URLinfo_log