On 26/08/2020 08:37, Stephan Bergmann wrote:
On 25/08/2020 11:07, Stephan Bergmann wrote:
At least when building recent master on recent Fedora rawhide aarch64
with (among others) --with-system-zlib, CppunitTest_sw_htmlexport
fails with
[...]
The base64-encoded payload apparently is a PNG image. And from what
little I know about PNG, it looks plausible to me that there can be
different (compressed) PNG content that decompress to identical raw
data, and that the LibreOffice code would be allowed to generate
differing (compressed) PNG content for the above data:image/png URL
payload.
What supports the theory that "the LibreOffice code would be allowed to
generate differing (compressed) PNG content" is the Fedora zlib commit
<https://src.fedoraproject.org/rpms/zlib/c/25e9802713484882c27c1f979a6610a42414ee13>
"aarch64 optimizations", adding lots of code that presumably is only
relevant for aarch64 and presumably changes details of the compression
algorithm.
...and looks like
<https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/message/AMOZA4K5RKCZEKA6QWY4PLM34UH3ZZ4Q/>
"Re: Fwd: Re: CppunitTest_sw_htmlexport failing due to zlib variation?"
on the Fedora dev list supports the theory even further
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