[INFO] cloning repository https://github.com/y011d4/factor-from-random-known-bits
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/y011d4/factor-from-random-known-bits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy011d4%2Ffactor-from-random-known-bits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy011d4%2Ffactor-from-random-known-bits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee9ade6f5a21618e701ffacba320670abd069434
[INFO] checking y011d4/factor-from-random-known-bits against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy011d4%2Ffactor-from-random-known-bits" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/y011d4/factor-from-random-known-bits on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/y011d4/factor-from-random-known-bits
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/y011d4/factor-from-random-known-bits
[INFO] tweaked toml for git repo https://github.com/y011d4/factor-from-random-known-bits written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/y011d4/factor-from-random-known-bits already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.14.1
[INFO] [stderr]   Downloaded pyo3-build-config v0.14.1
[INFO] [stderr]   Downloaded pyo3-macros v0.14.1
[INFO] [stderr]   Downloaded pyo3 v0.14.1
[INFO] [stderr]   Downloaded rug v1.12.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 019cb22221480d4a901ebdb2ed20351178e48ea7216d37f45df4996988966845
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "019cb22221480d4a901ebdb2ed20351178e48ea7216d37f45df4996988966845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "019cb22221480d4a901ebdb2ed20351178e48ea7216d37f45df4996988966845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "019cb22221480d4a901ebdb2ed20351178e48ea7216d37f45df4996988966845", kill_on_drop: false }`
[INFO] [stdout] 019cb22221480d4a901ebdb2ed20351178e48ea7216d37f45df4996988966845
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b36547d17e9cb8e47fe48434188804f022907d88f638a7ab861142b919c1b39c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b36547d17e9cb8e47fe48434188804f022907d88f638a7ab861142b919c1b39c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling pyo3-build-config v0.14.1
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.5
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling rug v1.12.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]    Compiling pyo3-macros-backend v0.14.1
[INFO] [stderr]    Compiling pyo3 v0.14.1
[INFO] [stderr]     Checking indoc v0.3.6
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling pyo3-macros v0.14.1
[INFO] [stderr]     Checking ctrlc v3.1.9
[INFO] [stderr]     Checking factor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> examples/factor_cui.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `factor` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/bench.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b36547d17e9cb8e47fe48434188804f022907d88f638a7ab861142b919c1b39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b36547d17e9cb8e47fe48434188804f022907d88f638a7ab861142b919c1b39c", kill_on_drop: false }`
[INFO] [stdout] b36547d17e9cb8e47fe48434188804f022907d88f638a7ab861142b919c1b39c
