[INFO] crate a2 0.4.0 is already in cache
[INFO] extracting crate a2 0.4.0 into work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/a2/0.4.0
[ERROR] No such file or directory (os error 2)
[INFO] retrying in 10ms
[ERROR] No such file or directory (os error 2)
[INFO] retrying in 20ms
[ERROR] this task or one of its parent failed!
[ERROR] unable to download a2 version 0.4.0
[ERROR] caused by: failed to fill whole buffer
[ERROR]