[INFO] fetching crate two_timer 2.2.0...
[INFO] testing two_timer-2.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate two_timer 2.2.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate two_timer 2.2.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate two_timer 2.2.0
[INFO] finished tweaking crates.io crate two_timer 2.2.0
[INFO] tweaked toml for crates.io crate two_timer 2.2.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate two_timer 2.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_regex v0.4.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.43
[INFO] [stderr]   Downloaded num-integer v0.1.39
[INFO] [stderr]   Downloaded serde v1.0.100
[INFO] [stderr]   Downloaded serde_derive v1.0.100
[INFO] [stderr]   Downloaded num-traits v0.2.6
[INFO] [stderr]   Downloaded pidgin v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d05230a03dc59e7e081018620298e12d6a058fca166cec23cd2deb091a671d3
[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" "4d05230a03dc59e7e081018620298e12d6a058fca166cec23cd2deb091a671d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d05230a03dc59e7e081018620298e12d6a058fca166cec23cd2deb091a671d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d05230a03dc59e7e081018620298e12d6a058fca166cec23cd2deb091a671d3", kill_on_drop: false }`
[INFO] [stdout] 4d05230a03dc59e7e081018620298e12d6a058fca166cec23cd2deb091a671d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bed8471b4cedf2d681db9ee279a777892684e6f437aa48ccde1e4358a881d27b
[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" "bed8471b4cedf2d681db9ee279a777892684e6f437aa48ccde1e4358a881d27b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]    Compiling serde_regex v0.4.0
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling pidgin v0.4.0
[INFO] [stderr]    Compiling two_timer v2.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.60s
[INFO] running `Command { std: "docker" "inspect" "bed8471b4cedf2d681db9ee279a777892684e6f437aa48ccde1e4358a881d27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bed8471b4cedf2d681db9ee279a777892684e6f437aa48ccde1e4358a881d27b", kill_on_drop: false }`
[INFO] [stdout] bed8471b4cedf2d681db9ee279a777892684e6f437aa48ccde1e4358a881d27b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bb810ba76faf99cdd4e1008a6c8440d4ebd34f6081e0ca9faa6d90d177da5a0
[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" "5bb810ba76faf99cdd4e1008a6c8440d4ebd34f6081e0ca9faa6d90d177da5a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling two_timer v2.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/tests.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 `two_timer`
[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] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5bb810ba76faf99cdd4e1008a6c8440d4ebd34f6081e0ca9faa6d90d177da5a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb810ba76faf99cdd4e1008a6c8440d4ebd34f6081e0ca9faa6d90d177da5a0", kill_on_drop: false }`
[INFO] [stdout] 5bb810ba76faf99cdd4e1008a6c8440d4ebd34f6081e0ca9faa6d90d177da5a0