can't bisect old releases

[matthiaskrgr]

I was trying to bisect a regression that was introduced between 1.44 and 1.45 but cargo-bisect rustc would not let me:

bisecting ci builds
starting at 20fc02f836f3035b86b56a7cedb97c5cd4ed9612, ending at 10c2316a6bf7cf9255f991e06e82ce692e6f84d5
opening existing repository at "rust.git"
refreshing repository
fetching (via local git) commits from 20fc02f836f3035b86b56a7cedb97c5cd4ed9612 to 10c2316a6bf7cf9255f991e06e82ce692e6f84d5
opening existing repository at "rust.git"
refreshing repository
looking up first commit
looking up second commit
checking that commits are by bors and thus have ci artifacts...
finding bors merge commits
found 213 bors merge commits in the specified range
  commit[0] 2020-04-20UTC: Auto merge of #71356 - Dylan-DPC:rollup-liockhk, r=Dylan-DPC
<snip>
  commit[212] 2020-06-02UTC: Auto merge of #72905 - JohnTitor:rollup-phtyo5i, r=JohnTitor
ERROR: no commits between 20fc02f836f3035b86b56a7cedb97c5cd4ed9612 and 10c2316a6bf7cf9255f991e06e82ce692e6f84d5 within last 167 days

[bjorn3]

CI artifacts are only stored for a limited amount of time due to storage cost.

[LeSeulArtichaut]

IIRC they are stored 180 days, so a bit more than 3 release cycles.

[Mark-Simulacrum]

Yes, this is largely expected. Nightlies should be available indefinitely at this point though. (Individual PR artifacts would roughly 8-10x increase storage costs)