------- Comment From christian.r...@de.ibm.com 2020-07-30 10:45 EDT-------
Compiled and ran DeInflate.java test program.
# javac DeInflate.java
Without fix encountered the following behaviour:
# java DeInflate.java
Exception in thread "main" java.lang.RuntimeException: De/inflater 
at DeInflate.check(DeInflate.java:91)
at DeInflate.main(DeInflate.java:139)

# dpkg -i zlib1g_1.2.11.dfsg-2ubuntu2_s390x.deb
(Reading database ... 58606 files and directories currently installed.)
Preparing to unpack zlib1g_1.2.11.dfsg-2ubuntu2_s390x.deb ...
Unpacking zlib1g:s390x (1:1.2.11.dfsg-2ubuntu2) over (1:1.2.11.dfsg-2ubuntu1) 
Setting up zlib1g:s390x (1:1.2.11.dfsg-2ubuntu2) ...
Processing triggers for libc-bin (2.31-0ubuntu9) ...

Problem not longer seen.

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  [Ubuntu 20.04] zlib on s390x may produce incomplete raw (but not
  gzip/zlib) streams

Status in Ubuntu on IBM z Systems:
Status in zlib package in Ubuntu:
Status in zlib source package in Focal:
Status in zlib source package in Groovy:

Bug description:
  zlib on s390x may produce incomplete raw (but not gzip/zlib) streams

  ---uname output---
  Linux t35lp56.lnxne.boe 5.8.0-20200703.rc3.git0.52a479d42203.300.fc31.s390x 
#1 SMP Fri Jul 3 00:46:20 CEST 2020 s390x s390x s390x GNU/Linux
  Machine Type = z15 
  A debugger is not configured
  ---Steps to Reproduce---
   Create a raw (negative windowBits value) stream with zlib. EOBS might be 
missing or truncated.

  This affects all distro levels that contain hardware acceleration
  (DFLTCC) patch. I've attached the preliminary fix.

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