GIF ImageReader does not call passComplete in IIOReadUpdateListener

GIF ImageReader calls IIOReadUpdateListener.passStarted() when reading a GIF image but does not call any passComplete. All other ImageReaders are consistent in calling a passComplete() when they call a passStarted() for a particular pass. It would be nice if GIF ImageReader also does the same thing in order to avoid the inconsistency.

This is reproducible right from JDK1.4+ on Solaris as well as Win32 platforms.
I have attached a sample code in which a GIF ImageReader reads an animated gif from a file. Execute the sample code. You would see a set of passStarted() calls but passComplete() would never be called during the read process.
CR 5096514 was closed as duplicate for this CR.
tested jdk 7 b59.

failed tests with crash:
TEST Testcase ReadListenerCrashTest 11/45 146/271 FAIL
TEST Testcase WriteListenerCrashTest 12/45 147/271 FAIL

Results:
/net/vice.russia.sun.com/export/home0/results/1.7.0_fcs/b59/2d/winxppro-i586/1.7.0_fcs_b59_winxppro-i586_01

crash logs attached.