[INFO] updating cached repository tscritch/rust-engine
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tscritch/rust-engine
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tscritch/rust-engine" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tscritch/rust-engine"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tscritch/rust-engine'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tscritch/rust-engine" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tscritch/rust-engine"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tscritch/rust-engine'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a62367eb7ec4173e4325e8f3967a74c9469a7d0
[INFO] sha for GitHub repo tscritch/rust-engine: 1a62367eb7ec4173e4325e8f3967a74c9469a7d0
[INFO] validating manifest of tscritch/rust-engine 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 tscritch/rust-engine 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 tscritch/rust-engine
[INFO] removed path dependency gl from tscritch/rust-engine
[INFO] finished frobbing tscritch/rust-engine
[INFO] frobbed toml for tscritch/rust-engine written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tscritch/rust-engine/Cargo.toml
[INFO] started frobbing tscritch/rust-engine
[INFO] removed path dependency gl from tscritch/rust-engine
[INFO] finished frobbing tscritch/rust-engine
[INFO] frobbed toml for tscritch/rust-engine written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tscritch/rust-engine/Cargo.toml
[INFO] crate tscritch/rust-engine 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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `gl`.
[INFO] [stderr]     ... required by package `rust-engine v0.1.0 (/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tscritch/rust-engine)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.13.0, 0.12.0, 0.11.0, 0.10.0, 0.9.0, 0.7.0, 0.6.5, 0.6.3, 0.6.2, 0.6.1, 0.6.0, 0.5.2, 0.5.1, 0.5.0, 0.4.0, 0.3.0, 0.1.0, 0.0.12, 0.0.11, 0.0.10, 0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5, 0.0.4, 0.0.3, 0.0.2, 0.0.1
[INFO] [stderr] 
[INFO] [stderr] the package `rust-engine` depends on `gl`, with features: `debug` but `gl` does not have these features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `gl` 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