[INFO] cloning repository https://github.com/gky360/rust_experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gky360/rust_experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgky360%2Frust_experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgky360%2Frust_experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7300b0b5e176ec36f7b96aad5f2aa7d8d7ad07d9
[INFO] testing gky360/rust_experiments against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgky360%2Frust_experiments" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gky360/rust_experiments 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 git repo https://github.com/gky360/rust_experiments
[INFO] finished tweaking git repo https://github.com/gky360/rust_experiments
[INFO] tweaked toml for git repo https://github.com/gky360/rust_experiments written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/gky360/rust_experiments 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 61a66ccbbd27ec7b1221530ee1d9a9332b10dbd808e65fdf084b6e578a46d6c2
[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" "61a66ccbbd27ec7b1221530ee1d9a9332b10dbd808e65fdf084b6e578a46d6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61a66ccbbd27ec7b1221530ee1d9a9332b10dbd808e65fdf084b6e578a46d6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61a66ccbbd27ec7b1221530ee1d9a9332b10dbd808e65fdf084b6e578a46d6c2", kill_on_drop: false }`
[INFO] [stdout] 61a66ccbbd27ec7b1221530ee1d9a9332b10dbd808e65fdf084b6e578a46d6c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f8450019eb08c2289ba1a1e2731b47056f8cab756a5ef26d3d9e80f91ad5b27a
[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" "f8450019eb08c2289ba1a1e2731b47056f8cab756a5ef26d3d9e80f91ad5b27a", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio-macros v0.2.4
[INFO] [stderr]    Compiling backtrace v0.3.43
[INFO] [stderr]    Compiling webpki-roots v0.18.0
[INFO] [stderr]    Compiling serde_json v1.0.46
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling rustls v0.16.0
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling dropbox-sdk v0.2.0
[INFO] [stderr]    Compiling tokio v0.2.11
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling hyper-sync-rustls v0.3.0-rc.6
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling h2 v0.2.1
[INFO] [stderr]    Compiling hyper v0.13.2
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.16s
[INFO] running `Command { std: "docker" "inspect" "f8450019eb08c2289ba1a1e2731b47056f8cab756a5ef26d3d9e80f91ad5b27a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8450019eb08c2289ba1a1e2731b47056f8cab756a5ef26d3d9e80f91ad5b27a", kill_on_drop: false }`
[INFO] [stdout] f8450019eb08c2289ba1a1e2731b47056f8cab756a5ef26d3d9e80f91ad5b27a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] b7e50c3dda1ee8481fbddd67dee3c8c7261022c348f8610029b266f794f8f57c
[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" "b7e50c3dda1ee8481fbddd67dee3c8c7261022c348f8610029b266f794f8f57c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.66s
[INFO] running `Command { std: "docker" "inspect" "b7e50c3dda1ee8481fbddd67dee3c8c7261022c348f8610029b266f794f8f57c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e50c3dda1ee8481fbddd67dee3c8c7261022c348f8610029b266f794f8f57c", kill_on_drop: false }`
[INFO] [stdout] b7e50c3dda1ee8481fbddd67dee3c8c7261022c348f8610029b266f794f8f57c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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", kill_on_drop: false }`
[INFO] [stdout] dc5268a69d9d976e78de33cee69b4536d00a08ce5650a436aceabecc93d424f8
[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" "dc5268a69d9d976e78de33cee69b4536d00a08ce5650a436aceabecc93d424f8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_experiments-be75b8bc722797c0
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_experiments-7fb38d29eb205ddb
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_experiments
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dc5268a69d9d976e78de33cee69b4536d00a08ce5650a436aceabecc93d424f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc5268a69d9d976e78de33cee69b4536d00a08ce5650a436aceabecc93d424f8", kill_on_drop: false }`
[INFO] [stdout] dc5268a69d9d976e78de33cee69b4536d00a08ce5650a436aceabecc93d424f8