Multipart upload causes panic: runtime error: slice bounds out of range

[kuenishi]

We have been experiencing deterministic failure on multipart upload against Riak CS. We are not sure how to fix this as don't have solid golang experience, and just reporting it here. See [1] for complete stack trace, and [2] for what we are doing in detail. Also it seems that the commit 7138fa9 [3] introduced this issue, as we don't see this issue against v0.4.3 but later than [3].

We found a workaround increasing partsize by one byte, to -s 5242881 to avoid this issue, hope it helps.

• [1] my gist for the stacktrace
• [2] complete command
• [3] 7138fa9?w=1

[rlmcpherson]

Thanks for the detailed bug report. I've reproduced the issue, still working on a fix.

[rlmcpherson]

This is resolved on master now and there is now a test for this scenario. The buffer size was not being reset in the correct place. Could you try testing and update if the issue persists in your tests?

[kuenishi]

I updated the s3gof3r and re-tested, and it was fixed! The issue has gone. Thank you very much for such quick fix.