[INFO] updating cached repository devroom-org/bot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/devroom-org/bot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/devroom-org/bot" "work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/devroom-org/bot" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/devroom-org/bot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/devroom-org/bot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85e5dcd4b54bb1941a43b7adc2e762e0110c4d36
[INFO] sha for GitHub repo devroom-org/bot: 85e5dcd4b54bb1941a43b7adc2e762e0110c4d36
[INFO] validating manifest of devroom-org/bot on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of devroom-org/bot on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing devroom-org/bot
[INFO] finished frobbing devroom-org/bot
[INFO] frobbed toml for devroom-org/bot written to work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot/Cargo.toml
[INFO] started frobbing devroom-org/bot
[INFO] finished frobbing devroom-org/bot
[INFO] frobbed toml for devroom-org/bot written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/devroom-org/bot/Cargo.toml
[INFO] crate devroom-org/bot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/telegram-rs/telegram-bot.git`
[INFO] [stderr]     Updating git repository `https://github.com/hyperium/hyper.git`
[INFO] [stderr]     Updating git repository `https://github.com/hyperium/hyper-tls.git`
[INFO] [stderr]     Updating git repository `https://github.com/seanmonstar/want`
[INFO] [stderr]     Updating git repository `https://github.com/hyperium/hyper`
[INFO] [stderr]     Updating git repository `https://github.com/hyperium/h2`
[INFO] [stderr] error: failed to select a version for `futures-channel-preview`.
[INFO] [stderr]     ... required by package `hyper v0.13.0-a.0 (https://github.com/hyperium/hyper#2d525aaa)`
[INFO] [stderr]     ... which is depended on by `hyper-tls v0.3.2 (https://github.com/hyperium/hyper-tls.git?rev=4b9ed650add2471e04de90bb888146f89468dd08#4b9ed650)`
[INFO] [stderr]     ... which is depended on by `telegram-bot v0.6.3 (https://github.com/telegram-rs/telegram-bot.git#6f049a79)`
[INFO] [stderr]     ... which is depended on by `devroom_bot v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot)`
[INFO] [stderr] versions that meet the requirements `^0.3.0-alpha.18` are: 0.3.0-alpha.18
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `futures-channel-preview v0.3.0-alpha.17`
[INFO] [stderr]     ... which is depended on by `futures-executor-preview v0.3.0-alpha.17`
[INFO] [stderr]     ... which is depended on by `futures-preview v0.3.0-alpha.17`
[INFO] [stderr]     ... which is depended on by `telegram-bot v0.6.3 (https://github.com/telegram-rs/telegram-bot.git#6f049a79)`
[INFO] [stderr]     ... which is depended on by `devroom_bot v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/devroom-org/bot)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `futures-channel-preview` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed