lenamonj opened a new pull request, #813: URL: https://github.com/apache/commons-compress/pull/813
`BlockLZ4CompressorOutputStream` threw `IndexOutOfBoundsException` from `rewriteLastPairs` when closed with nothing written: the method reads the first of the pairs it collected, and an empty stream has none. COMPRESS-650 fixed a different trigger of the same exception in 1.25.0; the empty stream still fails on master. The stream now emits the single zero token the LZ4 block format uses for empty input, which `BlockLZ4CompressorInputStream` decodes to zero bytes. Writing no bytes at all is not an option, since the input stream rejects a zero-length block as a premature end of stream. Test: `testEmptyInput`, red on master and green with the change. Default Maven goal green. - [x] Read the [contribution guidelines](CONTRIBUTING.md) for this project. - [x] Read the [ASF Generative Tooling Guidance](https://www.apache.org/legal/generative-tooling.html) if you use Artificial Intelligence (AI). - [x] I used AI to create any part of, or all of, this pull request. Which AI tool was used to create this pull request, and to what extent did it contribute? Claude (Anthropic) found the defect and drafted the fix and test; I reviewed them, reproduced the failure on a fresh clone of master, and ran the default Maven goal. - [x] Run a successful build using the default [Maven](https://maven.apache.org/) goal with `mvn`; that's `mvn` on the command line by itself. - [x] Write unit tests that match behavioral changes, where the tests fail if the changes to the runtime are not applied. This may not always be possible, but it is a best practice. - [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why. - [x] Each commit in the pull request should have a meaningful subject line and body. Note that a maintainer may squash commits during the merge process. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
