[INFO] cloning repository https://github.com/rdelfin/rust-bcc-tools
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rdelfin/rust-bcc-tools" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdelfin%2Frust-bcc-tools", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdelfin%2Frust-bcc-tools'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 518fc204883e4717dbedf145ddd42770053fa1f7
[INFO] testing rdelfin/rust-bcc-tools against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdelfin%2Frust-bcc-tools" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rdelfin/rust-bcc-tools 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/rdelfin/rust-bcc-tools
[INFO] finished tweaking git repo https://github.com/rdelfin/rust-bcc-tools
[INFO] tweaked toml for git repo https://github.com/rdelfin/rust-bcc-tools written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/rdelfin/rust-bcc-tools 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] 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] d10a5da17b6a0a80a036ac88151cd066f1ce788b3479ed697182945882709bab
[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" "d10a5da17b6a0a80a036ac88151cd066f1ce788b3479ed697182945882709bab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d10a5da17b6a0a80a036ac88151cd066f1ce788b3479ed697182945882709bab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d10a5da17b6a0a80a036ac88151cd066f1ce788b3479ed697182945882709bab", kill_on_drop: false }`
[INFO] [stdout] d10a5da17b6a0a80a036ac88151cd066f1ce788b3479ed697182945882709bab
[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] 462af28cd0abad90c56d16657cbe748887e852b174b8d584f7fc4663b93fd10a
[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" "462af28cd0abad90c56d16657cbe748887e852b174b8d584f7fc4663b93fd10a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling bcc-sys v0.16.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling aho-corasick v0.7.8
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]    Compiling ctrlc v3.1.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling thiserror v1.0.21
[INFO] [stderr]    Compiling bcc v0.0.29
[INFO] [stderr]    Compiling structopt v0.3.20
[INFO] [stderr]    Compiling rust-bcc-tools v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'backtrace'
[INFO] [stdout]    --> src/bin/opensnoop.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |             eprintln!("{:?}", x.backtrace());
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #53487 <https://github.com/rust-lang/rust/issues/53487> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'backtrace'
[INFO] [stdout]    --> src/bin/execsnoop.rs:119:33
[INFO] [stdout]     |
[INFO] [stdout] 119 |             eprintln!("{:?}", x.backtrace());
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #53487 <https://github.com/rust-lang/rust/issues/53487> for more information
[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 E0658`.
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-bcc-tools`
[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" "462af28cd0abad90c56d16657cbe748887e852b174b8d584f7fc4663b93fd10a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "462af28cd0abad90c56d16657cbe748887e852b174b8d584f7fc4663b93fd10a", kill_on_drop: false }`
[INFO] [stdout] 462af28cd0abad90c56d16657cbe748887e852b174b8d584f7fc4663b93fd10a