[INFO] updating cached repository https://github.com/theduke/rust-serialization-benchmarks
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4d24c6531d75942ef58ef4005e6dbb8f661b2225
[INFO] checking theduke/rust-serialization-benchmarks against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheduke%2Frust-serialization-benchmarks" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theduke/rust-serialization-benchmarks on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/theduke/rust-serialization-benchmarks
[INFO] finished tweaking git repo https://github.com/theduke/rust-serialization-benchmarks
[INFO] tweaked toml for git repo https://github.com/theduke/rust-serialization-benchmarks written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/theduke/rust-serialization-benchmarks already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a703715b29c655b4244dc9a89a1f377983e0f2fa08229f778052a02095f5e19e
[INFO] running `"docker" "start" "-a" "a703715b29c655b4244dc9a89a1f377983e0f2fa08229f778052a02095f5e19e"`
[INFO] [stderr]     Checking libc v0.2.19
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]     Checking linked-hash-map v0.0.9
[INFO] [stderr]     Checking iter-read v0.1.0
[INFO] [stderr]     Checking bencher v0.1.2 (https://github.com/theduke/bencher.git#59ee1f8f)
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking serde_test v0.8.21
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stderr]     Checking rmp v0.8.1
[INFO] [stderr]     Checking bincode v0.6.1
[INFO] [stderr]     Checking serde_cbor v0.4.0
[INFO] [stderr]     Checking cbor v0.4.0
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking rmp-serde v0.11.0
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]     Checking serde_yaml v0.5.0
[INFO] [stderr]     Checking serde-pickle v0.2.0
[INFO] [stderr]    Compiling serde_codegen v0.8.21
[INFO] [stderr]     Checking serde-hjson v0.8.1
[INFO] [stderr]    Compiling serde_derive v0.8.21
[INFO] [stderr]     Checking bson v0.3.2
[INFO] [stderr]     Checking rust_serialization_benchmark v0.1.0 (/opt/rustwide/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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[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" "a703715b29c655b4244dc9a89a1f377983e0f2fa08229f778052a02095f5e19e"`
[INFO] running `"docker" "rm" "-f" "a703715b29c655b4244dc9a89a1f377983e0f2fa08229f778052a02095f5e19e"`
[INFO] [stdout] a703715b29c655b4244dc9a89a1f377983e0f2fa08229f778052a02095f5e19e
