[INFO] crate rumblebars 0.3.0 is already in cache
[INFO] extracting crate rumblebars 0.3.0 into work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/rumblebars/0.3.0
[INFO] extracting crate rumblebars 0.3.0 into work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/reg/rumblebars/0.3.0
[INFO] validating manifest of rumblebars-0.3.0 on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rumblebars-0.3.0 on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rumblebars-0.3.0
[INFO] finished frobbing rumblebars-0.3.0
[INFO] frobbed toml for rumblebars-0.3.0 written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/rumblebars/0.3.0/Cargo.toml
[INFO] started frobbing rumblebars-0.3.0
[INFO] finished frobbing rumblebars-0.3.0
[INFO] frobbed toml for rumblebars-0.3.0 written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/reg/rumblebars/0.3.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: failed to select a version for `rustlex_codegen`.
[INFO] [stderr]     ... required by package `rumblebars v0.3.0 (/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/rumblebars/0.3.0)`
[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/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed