[INFO] updating cached repository theduke/rust-serialization-benchmarks
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/theduke/rust-serialization-benchmarks
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/theduke/rust-serialization-benchmarks" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/theduke/rust-serialization-benchmarks"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/theduke/rust-serialization-benchmarks'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/theduke/rust-serialization-benchmarks" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/theduke/rust-serialization-benchmarks"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/theduke/rust-serialization-benchmarks'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4d24c6531d75942ef58ef4005e6dbb8f661b2225
[INFO] sha for GitHub repo theduke/rust-serialization-benchmarks: 4d24c6531d75942ef58ef4005e6dbb8f661b2225
[INFO] validating manifest of theduke/rust-serialization-benchmarks 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 theduke/rust-serialization-benchmarks 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 theduke/rust-serialization-benchmarks
[INFO] finished frobbing theduke/rust-serialization-benchmarks
[INFO] frobbed toml for theduke/rust-serialization-benchmarks written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/theduke/rust-serialization-benchmarks/Cargo.toml
[INFO] started frobbing theduke/rust-serialization-benchmarks
[INFO] finished frobbing theduke/rust-serialization-benchmarks
[INFO] frobbed toml for theduke/rust-serialization-benchmarks written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/theduke/rust-serialization-benchmarks/Cargo.toml
[INFO] crate theduke/rust-serialization-benchmarks 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking theduke/rust-serialization-benchmarks against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-2/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/theduke/rust-serialization-benchmarks:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fa88ddad63e598bb7309e81739cc5bd1e92914beca7be06fd14cb7f32f263c3e
[INFO] running `"docker" "start" "-a" "fa88ddad63e598bb7309e81739cc5bd1e92914beca7be06fd14cb7f32f263c3e"`
[INFO] [stderr]     Checking serde v0.8.21
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]     Checking linked-hash-map v0.0.9
[INFO] [stderr]     Checking bencher v0.1.2 (https://github.com/theduke/bencher.git#59ee1f8f)
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rmp v0.8.1
[INFO] [stderr]     Checking cbor v0.4.0
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling serde_codegen v0.8.21
[INFO] [stderr]     Checking serde_test v0.8.21
[INFO] [stderr]     Checking serde_cbor v0.4.0
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]     Checking bincode v0.6.1
[INFO] [stderr]     Checking rmp-serde v0.11.0
[INFO] [stderr]     Checking serde-pickle v0.2.0
[INFO] [stderr]    Compiling serde_derive v0.8.21
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking serde-hjson v0.8.1
[INFO] [stderr]     Checking serde_yaml v0.5.0
[INFO] [stderr]     Checking bson v0.3.2
[INFO] [stderr]     Checking rust_serialization_benchmark v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `step_by`
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(step_by)]
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: Could not compile `rust_serialization_benchmark`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `step_by`
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(step_by)]
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: Could not compile `rust_serialization_benchmark`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fa88ddad63e598bb7309e81739cc5bd1e92914beca7be06fd14cb7f32f263c3e"`
[INFO] running `"docker" "rm" "-f" "fa88ddad63e598bb7309e81739cc5bd1e92914beca7be06fd14cb7f32f263c3e"`
[INFO] [stdout] fa88ddad63e598bb7309e81739cc5bd1e92914beca7be06fd14cb7f32f263c3e