Environment Information

macOS 26.4.1
JRuby 10.0.5.0
Bundler 4.0.10.0

Gem in question:
aws-sdk-kms 1.122.0 and 1.123.0

Expected Behavior

Gem installs with blank customizations.rb file.

Actual Behavior

Gem installs but binary data is copied into customizations.rb file.

yeah you can trace through tar_reader.rb in rubygems stdlib and it eventually gets to copy_stream... I suspect somewhere in there it's seeing the entry's zero length and interpreting that to mean "read the rest of the file"
@headius