The patching of zlib in openEuler with upstream bug fixes aligns its functionality with newer versions of zlib. However, the version number of zlib within openEuler remains unchanged, indicating the older version. Consequently, the test cases for perl-IO-Compress, which rely on the zlib version number to determine expected outcomes, will fail. To address this, perl-IO-Compress must be updated to accommodate the changes in zlib and remove the versioning-based checks from its test suite.
This bugfix commit for zlib in openEuler resulted in a change in its function behavior: