wget 1.21.2 checks failing with unexpected extra downloaded files

[Brian Inglis]

Latest wget 1.21.2 checks are all failing with unexpected extra files 
being downloaded under latest Cygwin 3.0.2 (under Windows 2020H2 with 
updates to 2021-August).
I have also tried building with and without autoreconf without change.

The issue appears under both 64 and 32 bit environments and under our 
Github Actions scallywag CI servers with minimal installs of only the 
required (Cygwin) lib...-devel etc. packages for building and testing.

The relevant test-suite.log files have been attached, lightly "sanitized 
for my protection".

Never had any problems with test failures (except unsupported IRI) 
building any previous releases under either Cygwin arch.

Is there any chance that files e.g. wget-log are being created or saved 
in directories differing *only* from the download directories by *case*, 
or by some unexpected *encoding* difference, due to file name characters 
prohibited by the underlying Windows filesystem, somewhere in the path, 
or an unexpected location?

Have there been any significant changes in testing requirements or 
utilities?

Could there be any issues from including updated gnulib m4 macros?
I have had a couple of recent issues with other packages requiring 
tweaks to gnulib m4 macros.

Please let me know if there is any further diagnosis I can do or 
information I can provide to assist with resolving this issue.

--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]

testenv-test-suite.log
Description: Text document

tests-test-suite.log
Description: Text document