[INFO] updating cached repository Thujopsis/Rust_Chatbot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Thujopsis/Rust_Chatbot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Thujopsis/Rust_Chatbot" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Thujopsis/Rust_Chatbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Thujopsis/Rust_Chatbot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Thujopsis/Rust_Chatbot" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Thujopsis/Rust_Chatbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Thujopsis/Rust_Chatbot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 47f1ca89daab8441419aa0f62ec128c99a7c62ff
[INFO] sha for GitHub repo Thujopsis/Rust_Chatbot: 47f1ca89daab8441419aa0f62ec128c99a7c62ff
[INFO] validating manifest of Thujopsis/Rust_Chatbot on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Thujopsis/Rust_Chatbot on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Thujopsis/Rust_Chatbot
[INFO] finished frobbing Thujopsis/Rust_Chatbot
[INFO] frobbed toml for Thujopsis/Rust_Chatbot written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Thujopsis/Rust_Chatbot/Cargo.toml
[INFO] started frobbing Thujopsis/Rust_Chatbot
[INFO] finished frobbing Thujopsis/Rust_Chatbot
[INFO] frobbed toml for Thujopsis/Rust_Chatbot written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Thujopsis/Rust_Chatbot/Cargo.toml
[INFO] crate Thujopsis/Rust_Chatbot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: failed to select a version for `serenity`.
[INFO] [stderr]     ... required by package `Rust_chatbot v0.1.0 (/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Thujopsis/Rust_Chatbot)`
[INFO] [stderr] versions that meet the requirements `= 0.5.1` are: 0.5.1
[INFO] [stderr] 
[INFO] [stderr] the package `Rust_chatbot` depends on `serenity`, with features: `` but `serenity` does not have these features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `serenity` 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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed