[INFO] cloning repository https://github.com/lambdastackio/tokio-http2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lambdastackio/tokio-http2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdastackio%2Ftokio-http2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdastackio%2Ftokio-http2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fad8751ada3568d8cf4890d6f39ab3ee7d7c7301
[INFO] testing lambdastackio/tokio-http2 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdastackio%2Ftokio-http2" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lambdastackio/tokio-http2 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/lambdastackio/tokio-http2
[INFO] finished tweaking git repo https://github.com/lambdastackio/tokio-http2
[INFO] tweaked toml for git repo https://github.com/lambdastackio/tokio-http2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/lambdastackio/tokio-http2 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] a7be60eecdfe15adabb4befb09de9148cc7e81fa999948ddf6e8b597e38cf31b
[INFO] running `Command { std: "docker" "start" "-a" "a7be60eecdfe15adabb4befb09de9148cc7e81fa999948ddf6e8b597e38cf31b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7be60eecdfe15adabb4befb09de9148cc7e81fa999948ddf6e8b597e38cf31b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7be60eecdfe15adabb4befb09de9148cc7e81fa999948ddf6e8b597e38cf31b", kill_on_drop: false }`
[INFO] [stdout] a7be60eecdfe15adabb4befb09de9148cc7e81fa999948ddf6e8b597e38cf31b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ccc82671ca63f1363b0260c6564dafaef06b149eb81ef29ccbb4379e92dd54e
[INFO] running `Command { std: "docker" "start" "-a" "2ccc82671ca63f1363b0260c6564dafaef06b149eb81ef29ccbb4379e92dd54e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling num-traits v0.1.36
[INFO] [stderr]    Compiling slog v1.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]    Compiling lazy_static v0.2.2
[INFO] [stderr]    Compiling crossbeam v0.2.10
[INFO] [stderr]    Compiling lazycell v0.4.0
[INFO] [stderr]    Compiling openssl v0.9.6
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling unicode-normalization v0.1.3
[INFO] [stderr]    Compiling scoped-tls v0.1.0
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling safemem v0.1.1
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling regex-syntax v0.4.0
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling unicode-segmentation v0.1.3
[INFO] [stderr]    Compiling spmc v0.2.1
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling net2 v0.2.26
[INFO] [stderr]    Compiling isatty v0.1.3
[INFO] [stdout] error[E0277]: `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-1.4.0/src/ser.rs:228:6
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub trait SyncSerialize: Send + Sync + 'static + Serialize {}
[INFO] [stdout]     |                                 ---- required by this bound in `SyncSerialize`
[INFO] [stdout] ...
[INFO] [stdout] 228 | impl SyncSerialize for fmt::Arguments<'static> {}
[INFO] [stdout]     |      ^^^^^^^^^^^^^ `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stdout]     |
[INFO] [stdout]     = help: within `Arguments<'static>`, the trait `Sync` is not implemented for `core::fmt::Opaque`
[INFO] [stdout]     = note: required because it appears within the type `&'static core::fmt::Opaque`
[INFO] [stdout]     = note: required because it appears within the type `ArgumentV1<'static>`
[INFO] [stdout]     = note: required because it appears within the type `[ArgumentV1<'static>]`
[INFO] [stdout]     = note: required because it appears within the type `&'static [ArgumentV1<'static>]`
[INFO] [stdout]     = note: required because it appears within the type `Arguments<'static>`
[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 E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slog` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2ccc82671ca63f1363b0260c6564dafaef06b149eb81ef29ccbb4379e92dd54e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ccc82671ca63f1363b0260c6564dafaef06b149eb81ef29ccbb4379e92dd54e", kill_on_drop: false }`
[INFO] [stdout] 2ccc82671ca63f1363b0260c6564dafaef06b149eb81ef29ccbb4379e92dd54e