[INFO] crate backtracking_iterator 0.4.3 is already in cache
[INFO] extracting crate backtracking_iterator 0.4.3 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/backtracking_iterator/0.4.3
[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 backtracking_iterator version 0.4.3
[ERROR] caused by: failed to fill whole buffer
[ERROR]