[INFO] updating cached repository ryanr1230/bolts
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ryanr1230/bolts
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ryanr1230/bolts" "work/ex/beta-1.38-1/sources/1.37.0/gh/ryanr1230/bolts"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ryanr1230/bolts'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ryanr1230/bolts" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanr1230/bolts"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanr1230/bolts'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e10de5cc65553338641a95a9fb486cf1904f62b
[INFO] sha for GitHub repo ryanr1230/bolts: 0e10de5cc65553338641a95a9fb486cf1904f62b
[INFO] validating manifest of ryanr1230/bolts 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 ryanr1230/bolts 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 ryanr1230/bolts
[INFO] finished frobbing ryanr1230/bolts
[INFO] frobbed toml for ryanr1230/bolts written to work/ex/beta-1.38-1/sources/1.37.0/gh/ryanr1230/bolts/Cargo.toml
[INFO] started frobbing ryanr1230/bolts
[INFO] finished frobbing ryanr1230/bolts
[INFO] frobbed toml for ryanr1230/bolts written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanr1230/bolts/Cargo.toml
[INFO] crate ryanr1230/bolts 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/ryanr1230/bolts/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[INFO] the lockfile is outdated, regenerating it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/nicolas-cherel/rumblebars.git`
[INFO] [stderr] error: failed to select a version for `rustlex_codegen`.
[INFO] [stderr]     ... required by package `rumblebars v0.3.0 (https://github.com/nicolas-cherel/rumblebars.git#69decda0)`
[INFO] [stderr]     ... which is depended on by `bolts v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ryanr1230/bolts)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.4.0, 0.3.4
[INFO] [stderr] 
[INFO] [stderr] the package `rumblebars` depends on `rustlex_codegen`, with features: `with-syntex` but `rustlex_codegen` does not have these features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `rustlex_codegen` 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