Incorrect size of inflated file data

[kpopv]

We've been experiencing a bug with v1.2.11.1_jtkv6.3: inflating a zip file doesn't return the expected amount of data. This could also reproduced this with v1.2.11.1_jtkv6 and the master cloned today.

With a zip file created as follows:

mkdir dir1
head -c 5757690 < /dev/urandom > dir1/file1
head -c  566784 < /dev/urandom > dir1/file2
zip datalessthansize.zip dir1/file1 dir1/file2

Reading the file using this zlib version gives incorrect data for file1:

File	Size	Size inflated data	Notes
file1	5757690	5750784	???
file2	566784	566784	OK

This behavior is different from the off the shelf zlib v1.2.11:

File	Size	Size inflated data	Notes
file1	5757690	5757690	OK
file2	566784	566784	OK

Please advise.